Subject to the observance of the applicable rules, conditions, and limitations set forth in this part:

(a) Foreign civil aircraft manufactured in a State that at the time of manufacture was a member of the International Civil Aviation Organization (ICAO), and registered in a State that at the time of flight is a member of ICAO, may be navigated in the United States;

(b) Foreign civil aircraft manufactured in a State that at the time of manufacture was not a member of ICAO, and registered in a State that at the time of flight is a member of ICAO, may be navigated in the United States,

(1) If the State of registry has notified ICAO that the requirements under which it issues or renders valid certificates of airworthiness are equal to or above the minimum standards established pursuant to the Chicago Convention, or

(2) If such notification has not been made to ICAO at the time of flight, there is on file with the Department a statement by the State of registry that, with regard to aircraft of the type that is proposed to be operated hereunder, the requirements under which certificates of airworthiness are issued or rendered valid are equal to or above the minimum standards established pursuant to the Chicago Convention.