The people w/o passports need to contact NCL ASAP to find out for sure. That itinerary is not a Caribbean itinerary. Closed-loop Caribbean itineraries may be fine for the birth certificate option, but you’re in South America and Central America for part of this itinerary. They may need to get to a passport office ASAP to get a passport issued. If they have their certified birth certificate, it should be easy, but they’ll have to go in person to get it done ASAP. Just renewed my husband’s passport online and expedited and it took 5 weeks. Always go to the source for clarity.