; and (7) in subsection (k), by striking 2023 and inserting 2029 . (b) Regulations Not later than 270 days after the date of the enactment of this Act, the Secretary shall promulgate rules to carry out the amendments made by subsection (a) of this section, and complete the biennial review process required by section 601(e)(2) of the Rural Electrification Act of 1936. (c) Sunset The authorities provided by section 779 of the Consolidated Appropriations Act, 2018 ( Public Law 115–141 ) shall have no force or effect beginning 270 days after the date of the enactment of this Act. (d) Transition rules (1) Availability of funds for administrative costs Not more than 1 percent of the unobligated balances of amounts made available, as of the date that is 270 days after the date of the enactment of this Act, to carry out the pilot program described in section 779 of the Consolidated Appropriations Act, 2018 ( Public Law 115–141 ) may be used for the costs of transitioning from the pilot program to the program under section 601 of the Rural Electrification Act of 1936, as amended by this Act. (2) Consolidation of funds (A) In general The unobligated balances of all amounts made available on or before June 30, 2025, to carry out the pilot program described in section 779 of the Consolidated Appropriations Act, 2018 ( Public Law 115–141 ) that are in excess of the amount described in subparagraph (B) of this paragraph are hereby transferred to and merged with amounts made available to carry out the program authorized under section 601 of the Rural Electrification Act of 1936. (B) Unfunded approvals The amount described in this subparagraph is the amount required to fully fund each project approved as of the date that is 270 days after the date of the enactment of this Act, under the pilot program described in such section 779 for which amounts were not obligated or partially obligated as of such date. 6202. Expansion of middle mile infrastructure into rural areas Section 602(g) of the Rural Electrification Act of 1936 ( 7