The bottom line is nothing should change for your student. The principal and the teachers are required to continue to follow the IEP unless the team meets to make adjustments. Whenever you are in a meeting you should ask who is acting as the LEA and if you will be discussing topics which require the allocation of resources, confirm that individual is authorized to "spend money." If there is no one at the meeting to authorized to spend money it can not be considered an IEP meeting because the team can not make decisions at the meeting. If you are meeting and no additional resources need to be allocated, then it does not really matter.