Anyone flying into a US airport from abroad, including into Puerto Rico, must now declare they have not been to the Republic of the Congo in the previous 21 days.^[1] The requirement applies to all international arrivals at US airports. For travelers landing on the island from overseas, that means the declaration is part of entry, the same as for arrivals anywhere else in the United States. The filed record does not spell out how the declaration is collected or what happens to a traveler who has visited the country within that window. Those are the questions a reader booking a trip home would want answered next.