Every employer who in any fiscal year has made any payment, loan, promise, agreement, arrangement or expenditure of the kind described and required by section 203(a) of the Act to be reported, shall, as prescribed by the regulations in this part, file with the Office of Labor-Management Standards, within 90 days after the end of each of its fiscal years, a report signed by its president and treasurer, or corresponding principal officers, together with a true copy thereof, containing the detailed information required therein by section 203(a) of the Act and found by the Secretary under section 208 thereof to be necessary in such report.