Mandatory reporting format and verification under section 35AC require Form No. 58C and timely submission to the National Committee. Approved associations or institutions must furnish the prescribed report in Form No. 58C to the National Committee within three months from the end of the financial year. After receiving the report, the National Committee may at any time inspect or verify the information furnished by the association or institution. The rule thus sets the reporting format, filing deadline, and post-filing verification power.