From the very start ask your bounty manager if the rules are already firm and final.
But the sad thing is before you are going to ask them, you'll see one rule that allowed them to change any rule as they wish.
The fact remains that if rules are stated as alterable then bounty hunters should be ready for things like this, such as in this case where we have kyc. Although, kyc should not have been used for bounty participants, but if that is what the law entails, then why should that not happen?
I have even noticed that kyc is now a common phenomenon with most bounties and this is in a way discouraging some bounty participants.