; (4) $50,000,000, to be available until September 30, 2023, shall be for grants under section 1464(d) under the Safe Drinking Water Act ( 42 U.S.C. 300j–24(d) ); (5) $500,000,000, to be available until expended, shall be for grants and activities under section 1459B of the Safe Drinking Water Act ( 42 U.S.C. 300j–19b ): Provided , That notwithstanding section 1459B(b)(4), the non-Federal share of the total cost of a project funded by a grant from funds appropriated herein shall be not more than 5 percent: Provided further , That for grants to projects providing assistance to low-income households described in section 1459B(b)(5) of the Safe Drinking Water Act (42 U.S.C. 300j–19b(b)(5)) from funds appropriated herein the Administrator shall eliminate the non-Federal cost share for such projects: Provided further That the Administrator may reserve up to 1.5 percent of funds appropriated herein for administrative, management, and oversight purposes