14 C.F.R. § 16.105 Failure to resolve informally.
Title 14 - Aeronautics and Space
If the matters addressed in the FAA notices are not resolved informally, the FAA may issue a Director's determination under §16.31.
Title 14: Aeronautics and Space
PART 16—RULES OF PRACTICE FOR FEDERALLY-ASSISTED AIRPORT ENFORCEMENT PROCEEDINGS
Subpart D—Special Rules Applicable to Proceedings Initiated by the FAA
§ 16.105 Failure to resolve informally.