This excerpt taken from the SIRI 8-K filed Mar 21, 2007.
A. Request for Transfer of Authorizations
FCC applications for the transfer of control of the following authorizations are being filed simultaneously with respect to the proposed merger:
165 As a result of Sirius modification of its authority to launch and operate a NGSO system instead of two GSO satellites, the call sign S2106 is no longer operative. Therefore, the Applicants are not seeking authority to transfer control of this call sign. This approach is consistent the FCCs prior treatment of this license. See Sirius Satellite Radio Inc., Application for Authorization to Transfer Control, File No. SAT-T/C-20021122-00225, FCC Form 312,