Whatever the contract says is what is correct. Don't go by what someone else told you. If you show up late and tell your base manager that Bob told you that you had 90 minutes from the time you called scheduling but the contract says 90 minutes from the time scheduling called you, than that would not be a valid excuse. If you go by the contract, you cannot get in trouble. My personal advice, if and when you get called, just be at the airport as soon as you can. I personally know some pilots who will take every bit of 90 minutes to get to the airport because they hold some grudge against the company. My opinion, if you are that junior and already hold a grudge against PNCL, leave the company. I actually enjoy my job, and love flying. It is what they are paying you to do(but not much). Chances are that if they are calling you with only 90 minutes of notice, the flight has been delayed until you get there. Being delayed sucks as a passenger, so I don't want them to be delayed anymore than the already are. Reserve sucked, so just put up with it for a little bit more and life will be better once you get a line.