Should any yards be assessed on an illegal forward pass penalty, or do they just spot the ball at the point of the foul and carry on? In the NFL it's a five yard penalty from the spot of the foul.
There are two different calls - an illegal forward pass, and an offside pass. Yardage is assessed on the first bone, but not the second.
In the BC-Mtl game, the call was an offside pass.