47 C.F.R. § 61.136
A concurrence may be revoked by a revocation notice or cancelled by a new concurrence. A revocation notice or a new concurrence, if less broad in scope than the concurrence it cancels, must bear an effective date not less than 45 days after its receipt by the Commission. A revocation notice is not given a serial number, but must specify the number of the concurrence to be revoked and the name of the carrier in whose favor the concurrence was issued. It must be in the following format:
Revocation Notice
(Name of carrier ____________)
(Post office address ______________)
(Date) ___________, 19__.
Secretary,
Federal Communications Commission, Washington, D.C. 20554.
Effective _____________, 19__ FCC Concurrence No. __, issued by (Name of concurring carrier) in favor of (Name of issuing carrier) is hereby cancelled and revoked. Rates and regulations of (Name of concurring carrier) and its connecting carriers will thereafter be found in Tariff FCC No. __ issued by _________ (If the concurring carrier has ceased operations, the revocation notice must so indicate.)
(Name of carrier) _______________________________
By _______________________________
(Title)_______________________________
47 C.F.R. §61.136