; and (v) in paragraph (7)— (I) in subparagraph (A), by striking after the date of enactment of this section and inserting after the date of enactment of the Clean Electricity and Transmission Acceleration Act of 2023 ; and (II) in subparagraph (B), by amending clause (i) to read as follows: (i) Not later than six months after the date of enactment of the Clean Electricity and Transmission Acceleration Act of 2023 , the Secretary, the Commission, and the heads of all Federal agencies with authority to issue Federal authorizations shall enter into a memorandum of understanding to ensure the timely and coordinated review and permitting of electric transmission facilities. . (2) Transmission infrastructure investment Section 219(b)(4)(B) of the Federal Power Act ( 16 U.S.C. 824s(b)(4)(B) ) is amended by striking section 216 and inserting sections 216 and 229 . 108. Facilitation of efficient environmental review of the designation of national interest electric transmission corridors (a) In general Section 216(h) of the Federal Power Act ( 42 U.S.C. 824p(h) ) is further amended— (1) by redesignating paragraph (9) as paragraph (10)