14 C.F.R. § 93.224 Return of slots.
Title 14 - Aeronautics and Space
(a) Whenever a slot is required to be returned under this subpart, the holder must notify the office specified in §93.221(a)(1) in writing of the date after which the slot will not be used. (b) Slots may be voluntarily returned for use by other operators by notifying the office specified in §93.221(a)(1) in writing.
Title 14: Aeronautics and Space
PART 93—SPECIAL AIR TRAFFIC RULES
Subpart S—Allocation of Commuter and Air Carrier IFR Operations at High Density Traffic Airports
§ 93.224 Return of slots.
