Yeah, they announced that in April. Players can wear #0 but not #00.
Duplicate numbers
The panel approved a rule that restricts the number of teammates wearing the same jersey number to two. The rules regarding players using duplicate numbers continue to require that they play different positions and aren’t on the field at the same time.
The Football Rules Committee recommended this adjustment to reduce the confusion caused by multiple players wearing the same number. Allowing more than two players with the same number has created confusion for the game officials and has made scouting opponents difficult. To respond to the popularity of single-digit numbers, players can wear “0” as a legal number.
Players disqualified for targeting will be allowed to remain on the sidelines starting with the 2020 football season.
www.ncaa.org