Lease and Option Agreement dated September 18, 2008 with Nu Star Exploration LLC

Definition and Interpretation

“Affiliate” means a company that:

is controlled by that party,

is controlled by the same company that controls that party, or

controls that party.

“Agreement” means this Lease and Option Agreement.

“BLM” means the Bureau of Land Management.

“Business Day” means a day (other than a Saturday) on which banks are open for business in British Columbia.

“Commercial Production” means the day on which an aggregate total of 10,000 tons of uranium ore has been shipped from the Purchased Properties for the purpose of earning revenue from the sale of such products.

“Control” means that the votes carried by the shares held of the controlled company by the controlling company, are sufficient for the controlling company to elect or appoint a majority of the directors of the controlled company.

“Data” has the meaning set forth in Section 6.5(a).

“Effective Date” means September 18, 2008.

“Expenditures” mean property maintenance costs and all costs and expenses incurred by or for the benefit of AUC in all activities conducted on or in respect of the Mineral Claims to advance the exploration and development of the Properties or in furtherance of the discovery, location, delineation or evaluation of any deposit of minerals within the Mineral Claims including, without limitation, aerial and surface reconnaissance, geophysical and geochemical work, and geological mapping; drill-site preparation; road building; land clearing; exploration drilling; trenching; excavation, driving of adits, sinking of shafts and similar underground operations; logging of drill holes and drill core; evaluation of geological, geophysical, geochemical or other exploration data; laboratory work, including without limitation, assay or metallurgical analyses; and reclamation and restoration work on any drill sites as required by any federal, state or local agency. Costs and expenses of all similar work not physically conducted on the Properties shall also constitute Expenditures to the extent that such work is for the purpose of, or in furtherance of, the discovery, location, delineation or evaluation of any deposits of minerals within the Properties.

“Laws” means with respect to the interpretation of this Agreement, the laws of the Province of British Columbia and the federal laws of Canada apply, and with respect to the Mineral Claims all applicable statutes, rules, codes, regulations, by-laws, or orders enacted, promulgated, implemented, and/or issued by any United States federal, State of Arizona, or local government entity will apply.

“Lease” means the lease of the Mineral Claims by Nu Star to AUC pursuant to the terms of this Agreement;

“Lease Payment Date” means the first day of the Initial Term, and should any Lease(s) be renewed, then it shall mean the Renewal Date. If any such date falls on a day that is not a Business Day, the date shall be the next following Business Day.

“Lease Payments” mean each amount due to Nu Star pursuant to Section 2.2.

“Lease Term” means the Initial Term or a Renewal Term, as the case may be.

“Option” means the option of AUC to purchase the Mineral Claims from Nu Star in accordance with the provisions of this Agreement.

“Option Exercise Date” has the meaning set forth is Section 2.4(c).

“Option Exercise Period” means the period commencing on the day following the Execution Date, or Renewal Date, as the case may be, and terminating 30 days prior to the end of the Initial Term, or a Renewal Term, as the case may be.

“Option Notice” means the written notice delivered by AUC to Nu Star 30 days prior to the expiry of a Renewal Term setting out which of the Mineral Claims AUC wishes to purchase.

“Renewal Date” means the anniversary date of each one year Lease that is renewed by AUC in accordance with this Agreement. For greater certainty, the anniversary date for the Leases shall be September 18.

“Renewal Notice” means a written notice delivered by AUC to Nu Star on or before 30 days prior to the end of the Initial Term or any Renewal Term, and which shall set out the Mineral Claims to be leased or not to be leased for such renewal term.

“Renewal Term” means a period of one year for any Lease that is renewed by AUC in accordance with this Agreement.

“Royalty” means the 4% Net Smelter Returns Royalty payable to Nu Star in accordance with Section 2.4, and further described in Schedule “B”.

“Shares” means shares of common stock of AUC.

“Term” means the term of the Lease which will commence on the Effective Date and terminate on the later of the date before the first anniversary of the Effective Date (the “Initial Term”) or, if AUC has delivered to Nu Star a Renewal Notice, the end of any Renewal Term. The Initial Term and any Renewal Term, are collectively referred to as the “Term”.

“Transfer Date” means the date upon which titles to the Mineral Claims are transferred to AUC, which, unless otherwise agreed upon by the parties, shall occur no later than 30 days after delivery of the Option Notice.

“$ or Dollars” means US denomination.

Lease

As of the Effective Date Nu Star leases all of its right, title and interest in and to the Properties to AUC (the “Lease”), together with all appurtenances and water rights incident, if any, to the Mineral Claims and all improvements on the Properties for the Term.

Other than the Initial Term, AUC is not obligated to enter into renewals of the Lease for the Properties.

During the Term and prior to and until exercise of the Option, AUC, its employees, agents and independent contractors shall have all such rights and privileges of exclusive right and option to:

enter the Properties;

have exclusive and quiet possession of the Properties;

do such prospecting, exploration, development or other mining work on the Properties and thereunder as AUC in its sole discretion may consider necessary; and

remove from the Properties and sell or otherwise dispose of uranium ore or yellowcake (U₃O₈), but only for the purposes of bulk testing and pilot plant operations.

Renewal

In the event AUC wishes to renew the Lease for one or more Mineral Claims after the Initial Term, and provided AUC is not in default, AUC will deliver to Nu Star a Renewal Notice, and the Lease will be renewed on the Renewal Date, provided AUC delivers to Nu Star the Consideration and agrees to incur the Expenditures.

At its sole option, AUC may choose not to renew the Lease for certain Mineral Claims or blocks of Mineral Claims which comprise the Properties. Mineral Claims that AUC wishes not to lease shall be identified in the Renewal Notice and:

the description of the Properties and Schedule “A” will be revised accordingly, and

the Renewal Consideration referred to in Section 2.3(b) for the Lease will be reduced by multiplying the Renewal Consideration by a fraction in which

the numerator is 449 minus the total of all Mineral Claims that AUC has not renewed its right to lease since the Effective Date, and

the denominator is 449.

In the event AUC chooses not to renew its lease of one or more Mineral Claims, AUC will have no further rights or obligations with respect to such Mineral Claims.

In the event AUC purchases some of the Mineral Claims pursuant to Section 2.4 below, but wishes to continue to lease other Mineral Claims, then the annual lease payments for the Mineral Claims that AUC wishes to lease, will be adjusted in the same manner as set out in Section 2.2(b).

Consideration

In consideration of the Lease and the Option, on the Effective Date AUC agrees to pay to NuStar the sum of $119,550 and issue the number of Shares that, based upon their average trading price over a 10 day period immediately preceding the Effective Date are valued at $80,000.

In consideration of any Renewal Terms entered into by AUC, AUC agrees to:

pay to Nu Star the cash payment set out in the column entitled “Cash Payment”, or issue to Nu Star the number of Shares that, based upon their average adjusted close price as quoted by Yahoo! Finance over a 10 day period immediately preceding the Renewal Date, equal in the applicable amount, as set out in the column entitled “Value of Shares of AUC” below, and

pay to the BLM the sum of $56,125 on or before a Renewal Date for renewal fees due for the Mineral Claims.

Option to Purchase

Nu Star hereby grants to AUC the sole and exclusive option to purchase Nu Star’s right, title and interest in all or some of the Mineral Claims (“Option”), together with all appurtenances, water rights, and improvements incident thereon, free and clear of all liens and encumbrances (save such exceptions, including overlaps of property and claims having priority in law to the rights of Nu Star and either referred to in Sections 4.2, 4.3, 8.1(c), or described in Schedule “A”).

The Option may only be exercised by AUC during an Option Exercise Period.

At any time after the Execution Date and provided AUC is not in default of any of its obligations under this Agreement, AUC may notify Nu Star of its intention to exercise the Option. Such notification will be in writing and will include a description of the Mineral Claims AUC wishes to purchase (the “Option Notice Date”).

The purchase price for the Mineral Claims pursuant to the Option will be twice the value of the Renewal Consideration that would otherwise be payable or transferrable to Nu Star if AUC had leased the Mineral Claims in the year following the year in which AUC delivered the Option Notice, as adjusted pursuant to Section 2.3(b).

Subject to Section 2.4(f), if AUC sells or otherwise disposes of minerals mined and removed from the Properties that AUC has purchased pursuant to this Section 0 (the “Purchased Properties”), Nu Star hereby retains and reserves, and AUC hereby grants and agrees to pay to Nu Star, in further consideration for the sale of the Purchased Properties, a 4% Net Smelter Returns royalty (the “Royalty”) on all yellowcake (U₃O₈) produced from uranium ore mined or recovered from the Purchased Properties once Commercial Production has been achieved.

At AUC’s option, for each breccia pipe of uranium mineralization located on one or more Mineral Claims within 1 claim block referred to in the description of the Purchased Properties (a “PIPE”), AUC may purchase Nu Star’s right to the Royalty on all the yellowcake (U₃O₈) produced from uranium ore mined or recovered from such Pipe, for the sum of $1,000,000.

The Option will terminate and AUC will have no further interest in the Properties under the following conditions:

on the last day of any existing Term, in the event

AUC has provided written notice to Nu Star that it wishes to terminate this Agreement and relinquish its option to purchase the Properties, or

AUC has failed to provide the required notice to renew the Lease in accordance with the time required pursuant to Section 2.2(a), and such failure was not otherwise excused in accordance with this Agreement; or

on such day that AUC informs Nu Star that it wishes to relinquish its option to purchase the Properties.

AUC Covenants

During the Term, AUC covenants to use commercially reasonable efforts to:

obtain all work permits, environmental approvals, and insurance required to carry out the Expenditures on the Properties;

maintain the Mineral Claims and Nu Star’s rights with respect thereto in good standing;

ensure that all third party consultants, equipment and materials suppliers, and independent contractors that AUC contracts to provide services and materials for or on behalf of the Properties are paid in full (subject to any holdbacks AUC may lawfully make);

report all progress, findings, reports, technical data and any other matter related to the Mineral Claims to Nu Star within ninety (90) days after the end of the Initial Term and each Renewal Term; and

act in accordance with good mining practices, in compliance with all applicable Laws and in accordance with the care and skill normally expected by someone conducting and managing exploration, development and mining activities on behalf of legal or beneficial owners of the Properties.

Title Documents

Nu Star shall provide AUC with the recording information with respect to the deeds, easements, or other documents known to Nu Star which bear upon title to the Mineral Claims, and shall provide AUC with copies of all such documents in Nu Star’s possession or control. Nu Star shall, upon AUC’s request, record any such document in Nu Star’s possession or control which has not been recorded. Nu Star shall provide AUC with copies of all documents filed with the BLM or county subsequent to the Effective Date, provided that Nu Star shall not file any document that impairs Nu Star’s title to the Mineral Claims without AUC’s prior written consent. No later than ten (10) days prior to the Effective Date, Nu Star and AUC shall prepare an inventory of all title documents provided to AUC. If during the Term, AUC prepares and records any documents concerning title to the Mineral Claims, AUC shall provide Nu Star with copies thereof in advance of filing such documents of record, or if it is not possible to provide such documents in advance, then as soon thereafter as possible.

AUC’s Right to Terminate Agreement

AUC has no obligation to exercise the Option, except at its sole and independent discretion. AUC shall have the unrestricted right at any time to terminate this Agreement without liability or obligation of any kind except for making such payments and issuing such shares as may have previously accrued, and satisfying all obligations under Sections 2.5, 4.1, and 5.1. Unless a

Shares

The Shares shall be subject to resale restrictions which are required to be imposed on the Shares issued to Nu Star hereunder, pursuant to applicable securities laws, including the rules and policies of any stock exchange or quotation service upon which AUC may be listed or quoted at the time and any applicable resale restrictions imposed by the U.S. Securities and Exchange Commission or under state securities laws.

Prior to the issuance of the Shares to Nu Star pursuant to this Agreement, Nu Star shall deliver to AUC a completed and executed “Prospective Investor Questionnaire” (“Questionnaire”) in the form attached hereto as Schedule B in connection with the issuance of such Shares and agrees to AUC filing certain personal information about Nu Star with any stock exchange or quotation service upon which AUC may be listed at the time and applicable securities regulators as required by applicable securities laws and policies and the rules and policies of any such exchange.

Property Maintenance

During the Term, AUC shall:

pay all taxes levied or assessed against the Mineral Claims; and

pay all applicable fees and perform all work requirements for the unpatented mining claims included in the Properties and file and/or record in the applicable office(s) all evidence of such payments or work as is required by Law (“Property Maintenance Costs”) prior to the date such obligations become due.

AUC shall provide Nu Star evidence of payment and performance of the Property Maintenance Costs as incurred and paid. Property Maintenance Costs, excluding any Mineral Claims renewal fees referred to in Section 2.3(b)(ii), shall be included in the Expenditures.

Upon abandonment of the Properties, or termination by AUC of this Agreement, AUC shall remain liable for any Property Maintenance Costs that are required to keep the Mineral Claims in good standing and which are due and payable within thirty (30) days or less following the date of abandonment or termination.

Amendments, Relocations and Patents

During the Term AUC shall have the right (but not the obligation) acting in good faith and in a prudent manner to amend or relocate any or all of the unpatented mining claims included in the Properties, to locate placer claims on ground theretofore covered by lode claims and vice versa, to locate mill sites on ground theretofore covered by mining claims and vice versa, and to locate any fractions existing on the Effective Date or resulting from the location, amendment, or relocation of mining claims or mill sites. All such locations, amendments, or relocations shall be made in the name of Nu Star. All expenses authorized by AUC in connection with the locating, amending, or relocating mining claims or mill sites shall be borne by AUC and shall constitute Expenditures for purposes of AUC’s Work Commitment. The rights of AUC under this Agreement shall extend to all such locations, amended locations, and relocations of the mining claims and mill sites, and the definition of Mineral Claims and Properties shall be amended or extended accordingly. At the request of Nu Star, AUC shall execute and record any documents necessary to clarify and confirm the interests of Nu Star in the new, amended or relocated mining or mill site claims.

Change in Federal Mining Law

If the United States establishes a leasing system or other system of tenure for lands or minerals now subject to location under the mining laws, and if the new system gives Nu Star an election to acquire rights under the new system in exchange for or in modification of Nu Star’s existing rights for the Mineral Claims upon prior written consent of Nu Star, AUC may make the election in the name or Nu Star with respect to any or all of the unpatented claims included in the Properties. Thereafter, during the term of this Agreement AUC shall pay all royalties, rentals, bonuses, fees, and other amounts required by the new system, but AUC shall be entitled to credit all such payments as Expenditures.

Covenants by Nu Star

During the Term, unless AUC has previously otherwise consented to in writing, Nu Star shall not sell, lease, dispose or encumber in any way any of its interest in the Properties except to AUC in accordance with this Agreement.

Work Commitment

During the Initial term and each Renewal Term thereafter, AUC shall make the Expenditures on or for the benefit of the Properties in the amounts set forth below, but in no event less than the minimal amount necessary to maintain and preserve each and all of the unpatented Mineral Claims included within the Properties under all applicable Laws (the “Work Commitment”). Work Commitment activities undertaken on the Properties shall be undertaken in a manner consistent with best industry practises for exploration and reclamation activities for breccia pipe uranium deposits.

Reporting and Audits

AUC shall furnish to Nu Star within forty-five (45) days following the end of each Lease Term, a report itemizing and detailing all Expenditures incurred by or for the benefit of AUC and deemed by AUC to qualify as such for the purposes of this Agreement. Nu Star shall be conclusively deemed to have accepted AUC’s determination that such Expenditures satisfy the terms and conditions of this Agreement unless Nu Star shall have made written exception within thirty (30) days after receipt by Nu Star of AUC’s statement of Expenditures.

Operations

AUC shall conduct all operations on the Properties during the Term (“Operations”) in a good and workmanlike manner and in accordance with accepted mining practice and all Laws, including, but not limited to, all Laws regarding reclamation of the Mineral Claims. Without in any manner limiting the generality of the foregoing, AUC shall post and provide all and any mined land reclamation performance bonds required in order to commence Operations upon the Properties. All decisions with respect to exploration and development of the Properties, including all decisions regarding the commencement, suspension, resumption, or termination of any Operations, shall be made by AUC in its sole discretion.

AUC hereby agrees to indemnify and hold Nu Star harmless from and against any cost, damage, claim, penalty, fine, liability or expense (including reasonable attorney's fees) incurred by or claimed against Nu Star, directly or indirectly, (i) as a result of AUC's use or occupancy of or Operation on the Properties, (ii) by reason of any failure of AUC, or its partners, officers, agents or employees, to perform its obligations under this Agreement, or (iii) otherwise as a result of AUC’s fault or negligence.

Nu Star hereby agrees to indemnify and hold AUC harmless from and against any cost, damage, claim, penalty, fine, liability or expense (including reasonable attorney's fees) incurred by or claimed against AUC, directly or indirectly, (i) as a result of the exercise

No Implied Covenants

Protection From Liens and Damages

Inspection

Nu Star, or Nu Star’s authorized representative, at its sole risk and expense, may enter on the Properties at any reasonable time for the purpose of inspection, but shall enter at Nu Star’s own risk and so as not to hinder unreasonably the operations of AUC.

Nu Star or Nu Star’s authorized representative may, at any reasonable time and at its sole expense, inspect any records pertinent and necessary for the purpose of substantiating the compliance of AUC with the provisions of this Agreement.

Data

Prior to, or as soon as practicable following the Effective Date, Nu Star shall deliver to AUC all drill core, all geological, geophysical, and engineering data and maps, logs of drill holes, results of assaying and sampling, and similar data concerning the Properties (or copies thereof) (“Data”) which are in Nu Star’s possession or control. Promptly thereafter, Nu Star and AUC shall prepare an inventory of all Data delivered to AUC by Nu Star.

Upon the expiration, surrender or other termination of this Agreement (except by exercise of the Option), AUC shall, within sixty (60) days after such termination, (i) return to Nu Star all drill core and original data delivered by Nu Star to AUC which are then in AUC’s possession or control, and (ii) make available for inspection and copying by Nu Star all factual geological and geophysical data and maps (not including interpretive data), logs of drill holes, and results of assaying and sampling pertaining the Mineral Claims which AUC has produced and/or obtained as a result of its exploration work under this Agreement and which are then in AUC’s possession or control. Upon Nu Star’s request made within sixty (60) days after termination of this Agreement (except by exercise of the Option), AUC shall, at Nu Star’s expense, provide Nu Star with the drill cores designated by Nu Star.

Neither party makes any representation or warranty as to the accuracy or interpretation of any such Data provided to the other party pursuant to this Agreement, and shall not be

Confidentiality

Insurance

Default

If either party (the “Notifying Party”) believes the other party (the “Notified Party”) is in breach of this Agreement, it shall notify the other party and give it the opportunity, as set forth in this subsection, to cure such breach. If the Notified Party does not:

cure such breach within thirty (30) days of the Notified Party’s actual receipt of said notice,

as to breaches that can be cured but cannot be cured within thirty (30) days of the Notified Party’s actual receipt of said notice using reasonable diligence, commence (and notify the Notifying Party of its commencement) to cure such breach within thirty (30) days after its actual receipt of notice and thereafter diligently pursue all steps necessary to cure the breach as expeditiously as is reasonable under the circumstances and thereafter cure the breach,

as to breaches that due to their nature cannot be cured, commence (and notify the Notifying Party of its commencement) within thirty (30) days after actual receipt of notice to diligently pursue all steps necessary to mitigate such breach to the extent reasonably possible as expeditiously as is reasonable under the

circumstances and promptly take such actions as are reasonably designed to prevent such breach from recurring, or

notify the Notifying Party within thirty (30) days of its actual receipt of notice from the Notifying Party that it disputes that there has been a breach and institute an action in a court of competent jurisdiction contesting the alleged breach within ten days after it so notifies the Notifying Party;

and if such breach is determined to be of a material nature, then, subject to the other provisions of this Section, the Notifying Party may terminate this Lease upon thirty (30) days notice to the Notified Party.

Unless otherwise expressly provided herein, termination of this Lease under this Section shall be without prejudice to any other rights or remedies to which the parties may be entitled, including the right to Damages.

Termination and Surrender

This Agreement:

shall terminate automatically upon termination of the Lease, unless renewed by AUC in accordance with this Agreement;

may be terminated by written notice of the non-defaulting party in the event that the other party is in default pursuant to Section 7.1;

may be terminated by mutual agreement of the parties; and

shall terminate automatically on the Transfer Date in the event AUC exercises the Option, and then only with respect to the purchased Mineral Claims.

Upon termination of this Agreement, by default or otherwise, all rights, liabilities, and obligations of AUC under this Agreement shall terminate, except as expressly provided herein. For the avoidance of doubt, termination of this Agreement shall not terminate any obligations of AUC to pay any amounts which become due under the Royalty, in the event AUC exercises the Option.

In the event of any controversy, the parties may, by mutual agreement, continue operations under this Agreement and AUC shall make the payments provided for in this Agreement notwithstanding the existence of the controversy. Upon the resolution of the controversy, such payments or restitutions shall be made as required by the terms of the decision of the mediator or arbitrator, or otherwise.

Removal of Equipment

Nu Star’s Representations and Warranties

Nu Star has full power and absolute authority and capacity to enter into this Agreement and to carry out the transactions contemplated hereby except where regulatory approval is required. Nu Star has obtained all authorizations for the execution, delivery and performance of this Agreement and such execution, delivery and performance and the consummation of the transactions herein contemplated will not conflict with, or accelerate the performance required by or result in any breach of any covenants or agreements contained in or constitute a default under, or result in the creation of any encumbrance, lien or charge under the provisions of its organizational documents or any members’ or managers’ resolution, indenture, agreement or other instrument whatsoever to which it is a party or by which it is bound or to which it may be subject and will not contravene any applicable Law.

Nu Star, or its agent, is the registered and/or beneficial owner of an undivided one hundred percent (100%) interest in and to the Mineral Claims or has full authority on behalf of the registered and beneficial owners to enter into this Agreement, subject only to the paramount rights of the United States, as to the unpatented mining claims.

except as set out in Schedule “A”, Nu Star, or its agent, owns good and defensible title to the Mineral Claims as reflected in the public records maintained by (i) the recorder’s offices of Mohave County and Coconino County, Arizona, and (ii) the Arizona State office of the Bureau of Land Management. Subject to the paramount title of the United States, rights previously granted by the United States to third parties, and the rights of third parties to use the surface of the Mineral Claims pursuant to applicable Laws, Nu Star owns the Properties free and clear of any encumbrances, and each of the Mineral Claims that is part of the Properties has been properly located and properly maintained in full compliance with all applicable Laws, all to the extent necessary to have an unpatented mining claim that is recognized as valid under all applicable Laws including the following: (i) the Mineral Claims were properly laid out and monumented; (ii) location notices and certificates were properly recorded and filed with appropriate governmental agencies; (iii) assessment work which was performed in accordance with industry standards and which was reasonably sufficient to hold the Mineral Claims has been performed and all governmental fees have been paid in a manner required by Law in order to maintain the Mineral Claims through the current assessment year; and (iv) all affidavits of assessment work, evidence of payment of governmental fees, and other filings required to maintain the Mineral Claims in good standing through the current

assessment year have been properly and timely recorded or filed with appropriate governmental agencies.

There are no adverse claims or challenges against or to the ownership of or title to the Properties or any portion thereof, nor is there any basis therefore.

The Properties are properly and accurately described in Schedule A hereto and are in good standing under the Laws.

The Properties are in compliance in all material respects with all applicable Laws.

Except as contemplated hereby, there are no outstanding agreements or options to acquire or purchase the Properties or any portion thereof or interest therein.

Nu Star represents that except for the Royalty, no person has any royalty or other interest whatsoever in production or profits from the Properties or any portion thereof.

Nu Star individually represents that no surface activities have been conducted by Nu Star on the Properties that have resulted in non-reclaimed surface disturbances subject to reclamation and rehabilitation obligations and that such surface activities, if any, have been properly completed in compliance with all applicable Laws, other than the activities conducted under exploration permits for which reclamation bonding remains in place.

There is no contract, option or any other right of another binding upon Nu Star to option, sell, transfer, assign, pledge, charge, mortgage, explore or in any other way option, dispose of or encumber all or part of the Properties or any portion thereof or interest therein other than pursuant to the provisions this Agreement.

There are no suits, actions, or other legal, administrative, arbitration, mediation, or other proceedings (“Proceeding”) to which it is a party or by which it would be bound, and it knows of no basis for and has not received any threat of assertion of any Proceeding against it or against any third party that could affect Nu Star’s compliance with the terms of this Agreement. If any Proceeding is threatened or commenced with respect to the Properties, it shall promptly notify AUC.

It is acquiring the securities solely for its own account for investment and not with a view to or for sale or distribution of the securities or any portion thereof and without any present intention of selling, offering to sell or otherwise disposing of or distributing the securities or any portion thereof in any transaction other than a transaction complying with the registration requirements of the 1933 Act, and applicable state securities or “blue sky” laws, or pursuant to an exemption therefrom.

The entire legal and beneficial interest of the securities that it is purchasing is being purchased for, and will be held for its account only, and neither in whole nor in part for any other person or entity.

It is not resident in British Columbia, Canada.

Nu Star’s Acknowledgements

It is not acquiring the Shares as a result of any form of general solicitation or general advertising, including advertisements, articles, notices or other communications published in any newspaper, magazine or similar media or broadcast over radio, or television, or any seminar or meeting whose attendees have been invited by general solicitation or general advertising.

It has access to and has reviewed the public filings of the Company available on EDGAR at www.sec.com, and has received all information that it deems necessary and appropriate to enable him, her or it to evaluate the financial risk inherent in making an investment in the Shares (the “Disclosure Documents”).

No securities commission or similar regulatory authority has reviewed or passed on the merits of the Shares.

There is no government or other insurance covering the Shares.

There are risks associated with the purchase of the Shares.

There are restrictions on its ability to resell the Shares and it is its responsibility to find out what those restrictions are and to comply with them before selling the Shares.

Nu Star has not received or been provided with a prospectus, offering memorandum or similar document and the decision to enter into the Agreement and to purchase the Shares has not been based upon any verbal or written representations as to fact or otherwise made by or on behalf of AUC or any other person except as set forth in the Disclosure Documents and Nu Star’s decision is based entirely upon publicly available information concerning the AUC.

If required by applicable securities legislation, policy or order or by any securities commission, stock exchange or other regulatory authority, Nu Star will execute, deliver, file and otherwise assist AUC in filing, such reports, undertakings and other documents with respect to the issue of Nu Star’s Shares as may be required.

The Shares are being issued to Nu Star as consideration for the acquisition by AUC or its wholly owned subsidiary AUC Exploration Utah Inc., or both of them of Properties or any interest in them.

Indemnity

AUC’s Representations and Warranties

It is a company duly incorporated and validly subsisting and is in good standing under the laws of the jurisdiction of its incorporation.

It has full power and absolute authority and capacity to enter into this Agreement and to carry out the transactions contemplated hereby except where regulatory approval is required.

It has duly obtained all corporate authorizations for the execution, delivery and performance of this Agreement and such execution, delivery and performance and the consummation of the transactions herein contemplated will not conflict with, or accelerate the performance required by or result in any breach of any covenants or agreements contained in or constitute a default under, or result in the creation of any encumbrance, lien or charge under the provisions of its constituting documents or any shareholders' or directors' resolution, indenture, agreement or other instrument whatsoever to which it is a party or by which it is bound or to which it may be subject and will not contravene any applicable Law.

Application

Transfers by AUC

AUC shall have the right to sell, option or joint venture its interest in this Agreement and the Properties prior to exercise of the Option:

only upon prior written approval of Nu Star, such approval not to be unreasonably withheld,

provided that such transaction shall not relieve AUC of any obligations and liabilities under this Agreement, and

provided that each purchaser, optionee or joint venturer prior to the effective date of any sale, option or joint venture shall agree in writing to be bound by the terms and conditions of this Agreement, including specifically the terms to pay the Royalty.

In no event shall AUC, by reason of any assignment or transfer of its rights hereunder, be relieved of the liability to issue to Nu Star any Shares AUC is or becomes obligations to issue to Nu Star, except upon the written consent of Nu Star agreeing to the acceptance of a cash equivalent, or shares of another entity.

Transfer by Nu Star

Nu Star shall not assign or transfer any rights in and to the Cash Payments or the Shares, except (i) with the prior written consent of AUC, which consent shall not be unreasonably withheld, or (ii) by operation of law in the event of an individual’s death, bankruptcy or a corporate reorganization. In the event of a permitted transfer, each legal transferee shall (i) provide AUC, in respect of an assignment or transfer of rights to receive Shares and in respect of an assignment or transfer of rights to receive the Cash Payment, with certified copies of all applicable legal documentation evidencing transfer by operation of law; (ii) ratify this Agreement, and, (iii) with respect to the Shares, execute and deliver to AUC a Questionnaire in the form set out in Schedule B prior to receiving any distribution of Shares. No change in ownership shall be binding on AUC until thirty (30) days after AUC has received copies of the instruments and documents required herein evidencing the change. Except as set forth herein, AUC shall have no obligation to recognize any claims to the Cash Payments or the Shares.

Except as expressly agreed in writing by AUC, no change or division in the ownership of the Properties or the right to receive the Cash Payments or issuance of the Shares shall enlarge the obligations or diminish the rights of AUC.

Affiliates

provide AUC, in respect of an assignment or transfer of rights to receive Shares and in respect of an assignment or transfer of rights to receive the cash payment, with certified copies of all applicable legal documentation evidencing transfer by operation of law;

ratify this Agreement, and,

with respect to the Shares, execute and deliver to AUC a Questionnaire prior to receiving any distribution of Shares.

Notices

If to Nu Star:

14418 South 40th Street
Phoenix, Arizona 85044
Fax: (480) 940-4736

If to AUC:

Suite 2800 South
Denver, CO 80202
Fax: (508) 240-1259

With a copy to:

Clark Wilson LLP

Barristers and Solicitors

Vancouver, BC V6C 3H1
Fax: 604 ###-###-####
Attention: Nicole M. Byres

Governing Law

Arbitration

Entire Agreement

Time of Essence

Binding

Counterparts

Third Party Beneficiaries

Force Majeure

Notwithstanding anything herein contained to the contrary, if any party is prevented from or delayed in performing any obligation under this Agreement, and such failure is occasioned by any cause beyond its reasonable control, excluding only lack of finances, then the time for the observance of the condition or performance of the obligation in question will be extended for a period equivalent to the total period the cause of the prevention or delay persists or remains in effect regardless of the length of such total period.

Any party hereto claiming suspension of its obligations as aforesaid will promptly notify the other party to that effect and will take all reasonable steps to remove or remedy the cause and effect of the force majeure described in the said notice insofar as it is reasonably able so to do and as soon as possible; provided that the terms of settlement of any labour disturbance or dispute, strike or lockout will be wholly in the discretion of the party claiming suspension of its obligations by reason thereof, and that party will not be required to accede to the demands of its opponents in any such labour disturbance or dispute, strike, or lockout solely to remedy or remove the force majeure thereby constituted. The party claiming suspension of its obligations will promptly notify the other party when the cause of the force majeure has been removed.

The extension of time for the observance of conditions or performance of obligations as a result of force majeure will not relieve the parties their obligations to keep the Properties in good standing pursuant to this Agreement.

Specific Performance

Perpetuities

Survival

Public Disclosure

Further Assurance

Amendment and Waiver

No amendment or modification to this Agreement shall be effective unless be in writing and signed by both parties.

No waiver by a party of any breach by the other party of any provision of this Agreement shall be deemed a waiver of any preceding or succeeding breach of the same or any other provisions hereof. No such waiver shall be effective unless in writing and then only to the extent expressly set forth in writing.

Section Headings, and Construction

The section headings herein are for reference only and have no legal significance. Defined terms include the plural or derivatives of such terms. Unless otherwise expressly provided herein, references to Sections and exhibits, schedules, or appendices refer to those of this Agreement, and references to subsections refer to those within the Section or subsection where the reference appears.

Provisions pertaining to requiring a party’s consent mean obtaining such consent in advance and in writing.

Severability

No Partnership

OBLIGATION

If Nu Star becomes entitled to a royalty pursuant to Section 2.4(e) of the Agreement, AUC shall calculate, as at the end of each quarter within each fiscal year used by AUC (“Fiscal Year”) subsequent to the date Commercial Production begins.

AUC shall within 45 days of the end of each quarter of each Fiscal Year, as and when any Net Smelter Returns are available for distribution, severally pay or cause to be paid to each Royalty Party 4% of the Net Smelter Returns to which Nu Star is entitled under Section 2.4(e) of the Agreement.

Nothing contained in the Agreement or this Schedule “B” shall be construed as conferring on Nu Star any right or interest in any of the Properties that AUC has purchased pursuant to this Agreement (“Purchased Properties”) except the right to receive royalty payments from AUC as and when due.

AUC agrees that on the request of Nu Star they will execute and deliver such documents as may be necessary to permit that Royalty Party to record its interest against the Purchased Properties.

NET SMELTER RETURNS

"Net Smelter Returns" means the net amount of money received by a Participant for its own account from the sale of minerals or concentrates extracted and derived from the ore mined from the Purchased Properties (“Mineral Production”) to a mill, smelter or other ore buyer after deduction of all Permissible Deductions.

“Permissible Deductions” means the aggregate (to the extent not previously deducted or accrued) that is paid or accrued in each monthly period relating to the Mineral Production as follows:

weighing, sampling, assaying and representation costs, and metal losses;

processor, refinery or smelter charges;

ore treatment charges, penalties, and any and all charges made by the purchaser of the Mineral Production;

any and all shipping, handling, forwarding and insurance costs which may be incurred in connection with the transportation of the Mineral Production;

all umpire charges which the purchaser may be required to pay; and

government imposed production, royalties and ad valorem taxes (excluding taxes on income).

Where a cost or expense otherwise constituting a Permissible Deduction is incurred in a transaction with a party not dealing at arm’s length (as that term is defined in the Income Tax Act (Canada), such costs or expenses may be deducted, but only as to the lesser of the actual cost incurred or the fair market value thereof considering the time of such transaction and under all the circumstances thereof.

PAYMENTS AND AUDITED STATEMENTS

Payment of Net Smelter Returns by AUC to Nu Star shall be made quarterly within 45 days after the end of each quarter of each Fiscal Year, and shall be accompanied with unaudited financial statements pertaining to the operations carried out on the Purchased Properties.

Within 90 days after the end of the Fiscal Year, the records relating to the calculation of the Net Smelter Returns royalty shall be audited by AUC’s external independent auditor and any resulting adjustments in the payment of Net Smelter Returns payable to Nu Star shall be made as follows:

if amounts are owed to Nu Star, the payment will be made forthwith together with interest at the Prime Rate plus 2%, and

if Nu Star has been over paid, such overpayment will be deducted from subsequent Net Smelter Returns royalty payments to Nu Star.

The information contained in the audited statements referred to in (b) above, will include detailed information relating to:

the quantity of Mineral Production and sale of Mineral Production for that Fiscal Year;

the Permissible Deductions, including Permissible Deductions carried over from previous years if in excess of the gross sales price(s) obtained for the Mineral Production in such previous years;

gross sales price(s) obtained for the Mineral Production; and

the calculation of the royalty payable to Nu Star.

Each annual audited statements shall be final and not subject to adjustment unless Nu Star delivers to AUC written exceptions in reasonable detail within 90 days after Nu Star receives such statements. Nu Star, or its representative duly authorized in writing, at its expense, shall have the right to audit the books and records of AUC related to Net Smelter Returns to determine the accuracy of the audited statements, but shall not have access to any other books and records of AUC. The audit shall be conducted by a chartered or certified public accountant.

Nu Star’s auditor shall have the right to conditional access to its books and records of AUC on execution of a written agreement by the auditor that all information will be held in confidence and used solely for purposes of audit and resolution of any disputes related to the report. A copy of Nu Star’s report shall be delivered to AUC upon completion, and any discrepancy between the amount actually paid by AUC and the amount which should have been paid according to Nu Star's report shall be paid forthwith, one party to the other. In the event that the said discrepancy is to the detriment of Nu Star and exceeds 5% of the amount actually paid by AUC, then AUC shall pay the entire cost of the audit.

Any dispute arising out of or related to any report, payment, calculation or audit shall be resolved solely by arbitration under the Commercial Arbitration Act (British Columbia) in accordance with Section 11.2.

No error in accounting or in interpretation of the Agreement shall be the basis for a claim of breach of fiduciary duty, or the like, or give rise to a claim for exemplary or punitive damages or for termination or rescission of the Agreement or the estate and rights acquired and held by AUC under the terms of the Agreement.

Category 8

An entity in which all of the equity owners satisfy the requirements of one or more of the foregoing categories.

_______ The Undersigned covenants, represents and warrants to AUC that it is a “Sophisticated Investor,” as defined by Regulation D promulgated under the Securities Act, as the Undersigned alone, or with the assistance of professional advisors, has such knowledge and experience in financial and business matters that the undersigned is capable of evaluating the merits and risks of Undersigned's purchase of the securities;