SUPPLEMENTARY PENSION PLAN

Exhibit 10.36

SUPPLEMENTARY PENSION PLAN

FOR SENIOR EXECUTIVES

OF DOMTAR INC.

Revised April 1, 2002

Table of Contents

Supplementary Pension Plan for Senior Executives of Domtar Inc.

Revised April 1, 2002

A Senior Executive who retires under the Base Plan on or beyond his Normal Retirement Date shall receive from Domtar, in accordance with the Supplementary Pension Plan, a monthly pension of one twelfth of the excess of (a) over (b) below:

A Senior Executive who retires early under the Base Plan shall receive from Domtar, in accordance with the Supplementary Pension Plan, a monthly pension of one twelfth of the excess of (a) over (b) defined below:

A Senior Executive who retires early and who is entitled to a pension from the Supplementary Pension Plan under Article 4 above, may elect to defer the commencement of this pension until the first day of any calendar month preceding or coinciding with his Normal Retirement Date, provided he has chosen the same option for the early retirement pension to which he is entitled in accordance with the Base Plan.

In such event, the amount of pension to which he is entitled in accordance with the Supplementary Pension Plan shall be increased in the same manner as the amount of pension to which he is entitled in accordance with the Base Plan and the payment of both pensions shall commence on the same date.

A Senior Executive who Terminates Continuous Employment before completing five (5) years of Continuous Employment is not entitled to any benefit under the Supplementary Pension Plan.

The normal form of pension payable under the Supplementary Pension Plan shall consist of monthly benefits payable in equal amounts starting on the first day of the month in which the Senior Executive commences retirement, and on the first day of every subsequent month for the life of the Senior Executive. If the Senior Executive dies before 60 monthly payments have been made, payments under the Supplementary Pension Plan shall continue until 60 monthly payments have been made.

For the purposes of Articles 3, 4, 5 and 7 of the present document, the pension amount due in accordance with the Base Plan shall be that which corresponds to the normal form of pension and shall exclude the additional pension resulting from excess contributions of the Base Plan.

If a Senior Executive elects (or is deemed to have elected) to receive the pension to which he is entitled in accordance with the Base Plan under an optional form of payment provided by the Base Plan, he will be assumed to have elected the same option for the payment of the pension due in accordance with the Supplementary Pension Plan.

In this event, the payment of the pension due in accordance with the Supplementary Pension Plan shall be made following the terms and conditions applicable under the Base Plan for the optional form of pension elected (or assumed to have been elected).

If a Senior Executive dies before the commencement of his pension payments, determined in accordance with Articles 3, 4 or 7, as applicable, no benefit shall be payable nor due in accordance with the Supplementary Pension Plan.

Subject to Article 9, if the Senior Executive dies after payment of his pension, determined in accordance with Articles 3, 4, 5 or 7, as applicable, has commenced, the death benefits shall be determined in accordance with the normal form of pension as described in Article 8.

A Senior Executive who is considered disabled under the Base Plan, and who continues, on that basis, to accrue Credited Service and pension credits under that Plan, shall continue to accrue Credited Service for the purposes of the Supplementary Pension Plan.

For the purposes of the Supplementary Pension Plan, a disabled Senior Executive is deemed to have retired on the date he retired under the Base Plan.

For the purposes of Article 14 of this Plan, a disabled Senior Executive who retires under the Base Plan is deemed to have retired on the Normal Retirement Date and to have held an Eligible Position until that date, without taking into account the years, for the purposes of calculating the Credited Service, between the retirement date and the Normal Retirement Date.

The Committee is responsible for the administration of the Supplementary Pension Plan, the supervision of its application and the interpretation of its provisions. The Committee may, at its discretion, approve other settlement options of benefits payable under this Plan.

From the moment the Senior Executive reaches age 60, and provided he holds an Eligible Position on that date, Domtar Inc. shall fund the benefits payable under this Plan by means of the Trust Fund contemplated in the Trust Agreement. This Plan shall thereafter be a retirement compensation arrangement within the meaning of the Income Tax Act.

Funding shall be effected by amortizing, over a five (5) year period, the cost of the benefits of this Plan for participation prior to age 60 and by paying, annually, the current service cost. The Base Plan’s actuary will determine the payments on account of amortization and current service.

Subject to paragraph (b), amounts paid by Domtar Inc. under the Trust Agreement shall vest in a Senior Executive only if he retires on the Normal Retirement Date and holds an Eligible Position at the time of his retirement. The Trustee shall pay the benefits under this Plan to the Senior Executive from that date onward. Any amount remaining in the Trust Fund after all benefits required to be paid under this Plan have been paid, including any Refundable Tax balance, shall be returned to Domtar Inc. If the Senior Executive terminates employment, dies or ceases to hold an Eligible Position prior to the Normal Retirement Date, the Trust Fund, including the Refundable Tax, shall be returned to Domtar Inc. and the Trust Agreement shall terminate.

Notwithstanding paragraph (a) of this Article, in the event of Default or Change of Control Domtar shall fully fund the benefits accrued by the Senior Executive under this Plan in accordance with the terms and conditions of the Trust Agreement, regardless of the Senior Executive’s age. In the event of (i) Default or (ii) death or termination of employment of the Senior Executive within twelve months following a Change of Control, or in the event that during such period, his employment is terminated by Domtar for a reason other than a serious breach of his duties causing a material prejudice to Domtar or, if during the same period, he ceases to hold an Eligible Position or the duties of the position he held at the time of the Change of Control are changed or reduced in such a manner as can reasonably be considered a constructive dismissal, the amounts paid by Domtar pursuant to the Trust Agreement are fully vested to the Senior Executive and, upon written notice from him or his assigns, as the case may be, the Trustee shall pay such amounts to him in accordance with the Trust Agreement, particularly Articles 4 to 7.

No benefit payable under the provisions of the Supplementary Pension Plan shall be in any manner capable of anticipation, surrender, commutation, alienation, sale, transfer, assignment, pledge, encumbrance or charge; nor shall any such benefit be in any manner subject to the debts, contracts, liabilities, engagements or torts of the person entitled to such benefit, except as specifically provided in any applicable legislation.

In the event of any conflict or inconsistency between the provisions of the Supplementary Pension Plan and the provisions of the Base Plan, the provisions of the Supplementary Pension Plan shall prevail.

Domtar Inc. or the Committee on the recommendation of the President and Chief Executive Officer of Domtar Inc. reserves the right to amend or terminate the Supplementary Pension Plan at any time. No change or termination shall adversely affect any benefits that have accrued up to the effective date of such change.