(a) A registry endorsement entitles a vessel to employment in the foreign trade; trade with Guam, American Samoa, Wake, Midway, or Kingman Reef; and any other employment for which a coastwise, Great Lakes, or fishery endorsement is not required.
(b) Any vessel eligible for documentation under §67.5 is eligible for a registry endorsement.
(c) A vessel otherwise eligible for a registry endorsement for which the Maritime Administration has not given approval for unrestricted transfer pursuant to 46 CFR part 221 loses that eligibility during any period in which it is mortgaged to a person not identified in §67.233(b).