Before being officially called up, the NHL and Gary Bettman met with Mailloux personally, and delivered the verdict that he's cleared to play. The NHL released the following statement this morning.
Mailloux has played one full season with the AHL's Laval Rocket with great success. In 70 games, the defenceman scored 14 goals and 47 points. He was drafted by the previous Marc Bergevin regime in Montreal, but the Habs still see Mailloux as a long term piece in the back end of their team.