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 Sec. 1.45 of the rules shall not be applicable to any objections duly filed under this section. [44 FR 38507, July 2, 1979]