What are my rights as a part-time employee?

I tried searching online but could not find a straight forward answer.

If I work part-time, are there a certain amount of hours I must work every week?


A few questions I've been wondering about for a while:
- am I entitled to whichever days off I'd like as long as I give sufficient notice before the schedule is made?
- if other employees leave, do I have to take the extra shifts given?
- is it necessary to give two weeks notice before leaving? Found the answer. If you've been working for over a year, then yes


I understand that for full-time employees, things are more straight forward.
eg. minimum of 40 hours of commitment a week, 2 weeks vacation, etc.
Not sure how things are laid out for P/T employees though.

Thanks guys!