47 CFR § 73.3587
Procedure for filing informal objections
February 16, 2021
Before FCC action on any application for an instrument of authorization, any person may file informal objections to the grant. Such objections may be submitted in letter form (without extra copies) and shall be signed. The limitation on pleadings and time for filing pleadings provided for in §1.45 of the rules shall not be applicable to any objections duly filed under this section.
[44 FR 38507, July 2, 1979]