((a)) ** .—** A department, agency, or instrumentality of the Federal Government may not use amounts appropriated or made available by any law to purchase electricity in a manner inconsistent with state law governing the provision of electric utility service, including—

((1)) state utility commission rulings; and

((2)) electric utility franchises or service territories established under state statute, state regulation, or state-approved territorial agreements.

((b))

((1)) ** .—** This section does not preclude the head of a federal agency from entering into a contract under section 801 of the National Energy Conservation Policy Act ().

((2)) ** .—** This section does not preclude the Secretary of a military department from—

((A)) entering into a contract under section 2394  of title 10; or

((B)) purchasing electricity from any provider if the Secretary finds that the utility having the applicable state-approved franchise (or other service authorization) is unwilling or unable to meet unusual standards of service reliability that are necessary for purposes of national defense.