If the FAA has withdrawn all or part of a previous approval made under subpart D of this part, the relevant portion of the Stage 3 restriction must be rescinded. The operator of the affected airport shall notify the FAA of the operator's action with regard to a restriction affecting Stage 3 aircraft operations that has been found not to meet the criteria of Sec. 161.305. Restrictions in agreements determined by the FAA not to meet conditions for approval may not be enforced with respect to Stage 3 aircraft operations.