; or (ii) $5 per million Btu of natural gas savings needed to make up any deficit in achieving natural gas savings that would otherwise be required under the applicable performance standard established under subsection (c). (B) Use of payments Alternative compliance payments collected by a State under subparagraph (A) shall be used by the State to implement the State program authorized under this section and to implement cost-effective energy efficiency programs that— (i) to the maximum extent practicable, achieve electricity savings and natural gas savings in the State sufficient to make up the deficit associated with the alternative compliance payments; and (ii) can be measured and verified in accordance with the applicable procedures and standards under subsection (e) or paragraph (3), as applicable. (5) Review of State program (A) Periodic review Every 2 years, the Secretary shall review State programs authorized under this section in approximately 1⁄2 of the States with such authorized State programs, so that each such State program shall be reviewed at least every 4 years. (B) Report To facilitate review under subparagraph (A), the Secretary may require a State to submit a report demonstrating the State program authorized under this section meets the requirements of this section, including— (i) reports submitted by retail electricity suppliers and retail natural gas suppliers to the State demonstrating compliance with applicable requirements; (ii) the impact of applicable requirements on projected electricity and natural gas demand within the State; (iii) an accounting of the use of alternative compliance payments by the State and the resulting electricity savings and natural gas savings achieved