; (bb) a cooperative purchase agreement permitted by the laws of the State in which the grant recipient is located; or (cc) another method that the Secretary determines to be appropriate. (iii) Amounts for supporting activities For any grant under the program, the amount of funds awarded for the purposes described in subclauses (II) through (IV) of subparagraph (A)(i), or other purposes related to those subclauses, as determined by the Secretary, shall not exceed $600,000. (D) Buy america (i) In general Except as provided in clause (ii), any electric school bus purchased using funds awarded under the program shall comply with the requirements described in section 5323(j) of title 49, United States Code. (ii) Exceptions (I) Waiver The Secretary may provide any waiver to the requirements described in clause (i) in the same manner and to the same extent as the Secretary of Transportation may provide a waiver under section 5323(j)(2) of title 49, United States Code. (II) Percentage of components and subcomponents The Secretary may grant a waiver in accordance with section 5323(j)(2)(C) of title 49, United States Code, when a grant recipient procures an electric school bus using funds awarded under the program for which the cost of components and subcomponents produced in the United States— (aa) for each of fiscal years 2022 through 2026, is more than 60 percent of the cost of all components of the school bus; and (bb) for fiscal year 2027 and each fiscal year thereafter, is more than 70 percent of the cost of all components of the school bus. (6) Waiver On request of a grant recipient, the Secretary may grant a waiver under paragraph (5)(B)(i)(II)(bb) to authorize a grant recipient— (A) to transfer a diesel school bus replaced using grant funds under the program under an agreement— (i) between— (I) the grant recipient; and (II) an entity described in subsection (a)(2) that serves an area that is in attainment of national ambient air quality standards under the Clean Air Act ( 42 U.S.C. 7401 et seq.)