Determination and certification of percentages

The percentage referred to in subsection (c)(2)(B) or (C) for any taxable year for any State having a balance referred to therein shall be determined by the Secretary of Labor, and shall be certified by him to the Secretary of the Treasury before June 1 of such year, on the basis of a report furnished by such State to the Secretary of Labor before May 1 of such year. Any such State report shall be made as of the close of March 31 of the taxable year, and shall be made on such forms, and shall contain such information, as the Secretary of Labor deems necessary to the performance of his duties under this section.