; Public Law 109–59 ), as applicable. (6) Maximum amount of grant Each grant awarded under this subsection shall be in an amount that is not more than $1,000,000. (7) Authorization of appropriations There is authorized to be appropriated to the Secretaries to award grants under this subsection $10,000,000 for each of fiscal years 2021 through 2025. (g) GAO report on workforce opportunities and barriers (1) In general The Comptroller General of the United States shall conduct a study that identifies issues relating to workforce development in intelligent and zero-emissions transportation technology, including— (A) any shortages of skilled employees in those fields; (B) issues relating to the transition of workers from traditional vehicle manufacturing, operation, and maintenance to the intelligent and zero-emissions transportation workforce; (C) issues relating to the transition of workers from traditional surface transportation installation, construction, manufacturing, operation, and maintenance to incorporation into the intelligent transportation workforce; and (D) examples of successful models of workforce development in those fields. (2) Report Not later than 1 year after the date of enactment of this Act, the Comptroller General of the United States shall submit a report on the results of the study under paragraph (1) to— (A) the Committee on Commerce, Science, and Transportation of the Senate; (B) the Committee on Energy and Natural Resources of the Senate; (C) the Committee on Health, Education, Labor, and Pensions of the Senate; (D) the Committee on Appropriations of the Senate; (E) the Committee on Transportation and Infrastructure of the House of Representatives; (F) the Committee on Energy and Commerce of the House of Representatives; (G) the Committee on Education and Labor of the House of Representatives; and (H) the Committee on Appropriations of the House of Representatives.