Orwell wrote:
It's fairly likely that the school officials will make it more of a hassle than it needs to be.
We don't have IEPs out here, but from what I know from conversing with Americans, yes. School districts always try to screw an IEP if they can get away with it. So, legally you have the right to have the old IEP followed until a new one can be crafted, but you may need to enforce it a bit.