Yes!
And she chose to agree to exactly that.
The woman was told three times that “this was the new rule”. Having a clause in the contract stating that rules can change, gives them the right. She agreed to it. She is not in a district school anyway, she was in a charter.
It’s a bogus catch-all. Basically, you’re supporting the notion that it’s a-o-k for the school to make any sort of decree at all, no matter how ridiculous, or blatantly prejudicial, and the school gets a pass.