As CBreezy said, there is no fight. If they give you an assignment that you are not legal for, call them and tell them. They cannot make you report for an illegal assignment, and you can get in trouble with the FAA if you do. If they don't give you 30 hours rest then you are free to sit home and get paid until they decide to give (and properly notify) you of a future, prospective 30 hour rest period. Or until you reach scheduled days off and those days then count as rest.