date which is 90 calendar days after the date on which such application was originally filed by such person, such application shall be deemed to have been approved by the Secretary for purposes of this section and such firearm may be made by such person. The Secretary shall only deny an application to make and register a firearm on the grounds that the applicable requirements under this section have not been satisfied, and may not deny an application solely on the grounds that a determination regarding whether to approve or deny such application could not be completed by the Secretary during the period described in the preceding sentence. . (c) Effective date The amendments made by this section shall apply to applications which are filed or pending on or after the date of enactment of this Act. 4. Reports and agreements (a) Unresolved NICS checks Not later than 180 days after the date of enactment of this Act, the Comptroller General of the United States, in conjunction with the Inspector General of the Department of Justice, shall submit a report to Congress— (1) detailing the number of NICS inquiries received during the period of calendar years 2010 through 2021 with respect to the transfer of a firearm which remained unresolved following the expiration of the 90-day period described in section 25.9(b)(1) of title 28, Code of Federal Regulations