18. DUTY IMPOSED BY LAW TO ALTER PREMISES. In the event that during the term hereof any alteration, addition, change, or otherwise to the premises, or any portion thereof, be required by any rule, regulation or law, the same shall be made by Lessee at Lessees sole cost and expense after first giving Lessor written notice of the proposed alteration, as more particularly required by Section 15 of this Lease.
19. INSPECTION FEES AND CHARGES. Lessee shall, in addition to all other sums, pay all fees for permits, inspections, or examinations of the premises, or any part thereof, or anything pertaining thereto, charged by any public authority having jurisdiction over the premises.
20. HAZARDOUS MATERIAL.
(a) Use of Hazardous Material. Lessee shall not cause or permit any Hazardous Material, as defined in subparagraph (f) below, to be generated, brought onto, used, stored, or disposed of in or about the premises or the building by Lessee or its agents, employees, contractors, subtenants, or invitees, except for such substances that are required in the ordinary course of Lessees business conducted on the premises or are otherwise approved by Lessor. Lessee shall:
(i) Use, store, and dispose of all such Hazardous Material in strict compliance with all applicable statues, ordinances, and regulations in effect during the Lease term that relate to public health and safety and protection of the environment (Environmental Laws), including those Environmental Laws identified in subparagraph (e) below; and
(ii) Comply at all times during the Lease term with all Environmental Laws.
(b) Notice of Release or Investigation. If, during the Lease term (including extensions), Lessee becomes aware of (a) any actual or threatened release of any Hazardous Material on, under, or about the premises or the building or (b) any inquiry, investigation, proceeding, or claim by any government agency or other person regarding the presence of Hazardous Material on, under, or about the premises or the Building, Lessee shall give Lessor written notice of the release or investigation within five (5) days after learning of it and shall simultaneously furnish to Lessor copies of any claims, notices of violation, reports, or other writings received by Lessee that concern the release or investigation.
(c) Indemnification. Lessee shall, at Lessees sole expense and with counsel reasonably acceptable to Lessor, indemnify, defend, and hold harmless Lessor and Lessors shareholders, directors, officers, employees, partners, affiliates, and agents with respect to all losses arising out of or resulting from the release of any Hazardous Material in or about the premises or the Building, or the violation of any Environmental Law, by Lessee or Lessees agents, contractors, or invitees. This indemnification includes: