<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by exAC:
The computer locks the agent out at 30 minutes for domestic and 60minutes at YYZ-T1 for International.</font>
Not true. I was able to go standby on an earlier YYZ-YYC flight by asking just 10 minutes before departure (they were just about to close the doors).