49 U.S.C. § 44109
Reporting transfer of ownership
(a) Filing Notices.—
A person having an ownership interest in an aircraft for which a certificate of registration was issued under section 44103 of this title shall file a notice with the Secretary of the Treasury that the Secretary requires by regulation, not later than 15 days after a sale, conditional sale, transfer, or conveyance of the interest.
(b) Exemptions.—
The Secretary—
(1)
shall prescribe regulations that establish guidelines for exempting a person or class from subsection (a) of this section; and
(2)
may exempt a person or class under the regulations.
( Pub. L. 103–272, § 1(e) , July 5, 1994 , 108 Stat. 1166 .)