14 CFR 380.65: Notification of change of operations or ownership.

(a) Not later than 30 days before any change in its name or address or before a temporary or permanent cessation of operations, each foreign charter operator registered under this subpart shall notify the Office of International Aviation , U.S. Air Carrier Licensing/Special Authorities Division, of the change by resubmitting OST Form 4530.

(b) A foreign charter operator registered under this subpart shall apply for an amendment to that registration not later than 30 days after either of the following events:

(1) A person listed on its existing registration as owning or holding beneficial interest in at least 10 percent of the operator or of the operator's stock reduces its holding to below 10 percent;

(2) A person not listed on the existing registration as owning or holding beneficial interest in at least 10 percent of the operator or of the operator's stock becomes an owner or holder of 10 percent or more of the company or of its stock.

(c) An application for an amendment shall be made by resubmitting OST Form 4530. The existing registration shall remain valid pending Department action on the amendment.