The top two teams in each division are assured a berth. Then it is the next two teams by record. If the fourth-place team in one division has a better record than the third-place team in the other, it can cross over to the other division and play its second-place team in its semi-final at the second-place team's site.
The first crossover was when B.C. played Montreal at Molson Stadium in the East semi-final in November 1997 when the Als were forced to book the game there as a U2 concert at the Big O precluded them from hosting the game at the bigger stadium.
[url=http://en.wikipedia.org/wiki/Montreal_Alouettes#The_current_Alouettes]http://en.wikipedia.org/wiki/Montreal_A ... _Alouettes[/url]
The crossover team also has to have an outright total points advantage on the third-place team of the other division to qualify -- it cannot have identical total points.
Oski Wee Wee,