When can a player selected in the USHL Futures Draft be placed on a USHL roster?

Players on the affiliated list can be moved to a team's active roster at any time and for any reason. If an affiliated player is moved to a team's active roster before the February 10 roster deadline, they will be eligible to play for the remainder of the regular season as well as the post-season. Affiliated players added to the active roster after February 10 will not be eligible to play in the post-season.

(Source: USHL.com)