As a part time cover driver, I have not been working a lot this summer. I have a mother part time job I go to when I don't work, but not knowing if I'm working everyday until 7 am sucks. My question is, what time is the latest I have to be "on call"? All day? 8am? 10am? I call in at 630-730 am and sometimes don't get a call back until 10-1030. Other days they say I'm "next up" and never get a call back....very frustrated. Especially having to pay a sitter every day for my kids when 90% of the time I don't get called in. Any info/suggestions that will help?