Per NHL.com, the rules of this expansion draft are the same as the ones used by the Las Vegas Golden Knights in 2017.
Each team has the option to either seven forwards, three defensemen and a goalie, or eight skaters and one goalie. Any player with a no-movement contract clause is automatically included on the protected list unless he waives the provision, which is exceedingly unlikely.
Any player with two years, or under, of professional experience, including unsigned draft picks, by the end of the 2020-21 season, is exempt from the draft and does not have to be protected.
Every team must expose at least two forwards, and one defenseman who have played more than 40 games in 2020-21 or 70 combined games in 2019-20 and 2020-21 are under contract through 2021-22. Goalies must be under contract for 2021-22 or a restricted free agent. Players who have sustained career-ending injuries or were on their team’s injured list for more than 60 games in 2020-21 may be exempted.
Seattle must select one player from the 30 other teams (Vegas is exempt per their entry agreement). They must have a minimum of 14 forwards, nine defensemen, and three goalies. For the 2021-22 season, at least 20 players must have active contacts. The total value of player contracts selected by Seattle must be between 60-100 percent of the prior season’s cap ceiling. In 2019-20 the maximum was $81.5M. Due to the coronavirus stoppage, that number is not going to rise, which makes the current range between $48.9-$81.5M.