14 CFR § 47.61 - Dealer's Aircraft Registration Certificates.
(1) Allow manufacturers to make any required flight tests of aircraft.
(2) Facilitate operating, demonstrating, and merchandising aircraft by the manufacturer or dealer without the burden of obtaining a Certificate of Aircraft Registration, AC Form 8050-3, for each aircraft with each transfer of ownership, under subpart B of this part.
(b) A Dealer's Aircraft Registration Certificate is an alternative for the Certificate of Aircraft Registration issued under subpart B of this part. A dealer may, under this subpart, obtain one or more Dealer's Aircraft Registration Certificates in addition to his original certificate, and he may use a Dealer's Aircraft Registration Certificate for any aircraft he owns.
(c) If the Dealer's Aircraft Registration Certificate expires under § 47.71, and an aircraft is registered under this subpart, application for registration must be made under § 47.31, or the assignment of registration number may be cancelled in accordance with § 47.15(i)(3).