During the Olympics, there are restrictions on teams making player transactions. The Olympic Roster freeze goes from February 4 at 3pm ET to February 22 at 11:59 ET.
During the freeze:
-No Trades are permitted
-Players can be sent down if they are waiver exempt, except for players that played in 16 of the team’s 20 NHL games prior to the freeze, or have been on the NHL roster for 80 league days prior to Jan 21
-Players can be placed on waivers during the freeze, but if the player was waived after their NHL team’s final game before the freeze, they do not have to report to their new team until February 17.
There are no restrictions on sending players down prior to the freeze.