This excerpt taken from the GIS 8-K filed Dec 14, 2007.
TRUTH IN LEASING REQUIREMENTS
Mail a copy of the Agreement to the following address via certified mail, return receipt requested, immediately upon execution of the Agreement. (14 CFR 91.23 requires that the copy be sent within twenty-four hours after it is signed):
Federal Aviation Administration
Aircraft Registration Branch
ATTN: Technical Section
Oklahoma City, OK 73125
Telephone the nearest Flight Standards District Office at least forty-eight hours prior to first flight under this Agreement and inform them of the following:
The location of the airport of departure;
The departure time; and
The registration number of the Aircraft involved.
Carry a copy of the Agreement in the Aircraft at all times.