This matters more than one might imagine, from Sports Illustrated's Allan Muir:

While general managers still have to worry about what to do with expiring contracts ahead of the April 3 trade deadline, one big concern has been taken off their plates.

The old American Hockey League Clear Day roster deadline, once a hand-in-hand event with the NHL trade deadline, is no more, thanks to the new CBA.

What does that mean? In the past, teams had to determine which eligible players they would make available to their farm teams for the postseason the same day as the trade deadline. Once those decisions were made, NHL teams were limited to four minor league call-ups the rest of the regular season, unless an emergency situation dictated the need for more.

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