45 CFR §1801.11

1. (a)Except as provided in §§ 1801.11 (b), 1801.12, and 1801.24, each institution may nominate up to four students annually. Additionally, a four-year institution may nominate up to three currently enrolled juniors who completed their first two college years at a two-year institution. Nominees may have legal residence in the same State as the institution or in different States.
2. (b)The Foundation may announce each year in its Bulletin of Information or on its website (http://www.truman.gov) special circumstances under which an institution may nominate additional candidates.
3. (c)All nominations must be made by the President of the institution or the designated Faculty Representative.