; and (B) the considerations the Administrator is using in developing the fuel standard. . (b) Enforcement Section 211(d) of the Clean Air Act ( 42 U.S.C. 7545(d) ) is amended— (1) in paragraph (1)— (A) by striking or (o) of this section or the regulations and inserting (o), or (w) of this section or the regulations ; (B) by striking or (o) of this section or who fails and inserting (o), or (w) of this section or who fails ; and (C) by striking or (o) of this section which establishes and inserting (o), or (w) of this section which establishes ; and (2) in paragraph (2), by striking and (o) of this section each place it appears and inserting (o), and (w) of this section . 6. Procurement of sustainable aviation fuel by the department of defense (a) In general Effective October 1, 2025, the Secretary of Defense shall make a bulk purchase of an amount of sustainable aviation fuel that is not less than 10 percent of the total amount of aviation fuel procured for operational purposes (as defined in section 2922h of title 10, United States Code) if— (1) the cost of sustainable aviation fuel is competitive with the fully burdened cost of conventional jet fuel available for the same purpose