Any application may be amended as a matter of right prior to the date of any final action taken by the Commission or designation for hearing. Amendments to applications shall be signed and submitted in the same manner, and with the same number of copies as was the original application. If a petition to deny or other formal objections have been filed to the application, the amendment shall be served on the parties.
47 C.F.R. §63.50
Sec. 303, 48 Stat. 1082, as amended; 47 U.S.C. 303