(a) United States Customs Service Form 7507 or International Civil Aviation Organization's General Declaration. The captain or agent of every aircraft departing from the United States for a foreign place or an outlying possession of the United States, except on a flight departing for and terminating in Canada, shall submit to the immigration officer at the port from which such aircraft is to depart a completed United States Customs Service Form 7507 or the International Civil Aviation Organization's General Declaration. The form shall contain a list of all alien crewmen on board, including alien crewmen who arrived in the United States as crewmen on an aircraft of the same line and who are departing as passengers. The surname, given name, and middle initial of each such alien crewman listed shall be shown. In addition, the captain or agent of the aircraft shall indicate the total number of alien crewmembers and the total number of United States citizen crewmembers.

(b) Notification of changes in employment for aircraft. The agent of the air transportation line shall immediately notify in writing the nearest immigration office of the termination of employment in the United States of each alien employee of the line furnishing the name, birth date, birthplace, nationality, passport number, and other available information concerning such alien. The procedure to follow in obtaining permission to pay off or discharge an alien crewman in the United States after initial immigration inspection, other than an alien lawfully admitted for permanent residence, is set forth in § 252.1(f) of this chapter.