Yes there is. At least 20 of the 30 players has to be under a contract for the 2021-2022 season. You can only pick 10 pending UFAs. You have to pick 14 forwards, 9 defence man, and 3 goalies.
The only UFAs that should be picked are Iafallo, Palmieri and Hall (if not resigned/traded) because there is nothing else of value to draft from their respective teams.