If it was unclear in the past, let me make it clear now.
ACASS is not an outfit I'd work for.
They aren't perfect. But, ACASS has work (from time to time) for those who need a shelter from inconsistent work. As for their contracts, I'm not sure they or any other contractor has much control over the T&Cs offered up to contractors.
It's buyer beware. OOps. Contract pilot beware.
If YOU get blindsided, YOU didn't do your due dilligence.
Did you?