2020—Subsec. (a)(2). Pub. L. 116–260, § 3002(l)(1), inserted “or heat” after “electrical power”.

Subsec. (e). Pub. L. 116–260, § 3002(l)(2), amended subsec. (e) generally. Prior to amendment, text read as follows: “There are authorized to be appropriated such sums as are necessary to carry out this section.”

Section effective on the date that is 1 day after Dec. 19, 2007, see section 1601 of Pub. L. 110–140, set out as a note under section 1824 of Title 2, The Congress.