1. UNITED STATES NATIONAL AMATEUR BALLROOM CHAMPIONSHIPS:  Properly registered Amateur Competitors are eligible to dance in any closed championship of the United States Ballroom Championships if they fulfill one of the following criteria:
a. Both members of the partnership are United States citizens or United States Resident Aliens (Green Card holders), and neither member of the partnership has been nominated by a national organization to represent another country in the previous 12 months.
b. One half of the partnership is a United States citizen or United States Resident Alien (Green Card holder), and neither member of the partnership has been nominated by a national organization to represent another country in the previous 12 months, and the half of the partnership that is not a U.S. citizen or United States Resident Alien (Green Card holder) has resided in the USA for the previous 6 months.
(1) Any Non-U.S. citizen or Non-United States Resident Alien (Green Card holder) who has resided in the United States of America for less than the previous twelve months may be required to submit a photo copy of their passport showing the date they entered the USA before their entry into a closed United States National Championship may be accepted.
c. Both members of the partnership are non-United States citizens or non-United States Resident Aliens (Green Card holders), but both members of the partnership have resided in the USA for the previous 6 months, and neither member of the partnership has been nominated by a national organization to represent another country in the previous 12 months.
(1) Any Non-U.S. citizen or non-United States Resident Alien (Green Card holder) who has resided in the United States of America for less than the previous twelve months may be required to submit a photo copy of their passport showing the date they entered the USA before their entry into a closed United States National Championship may be accepted.