14 C.F.R. § 121.316 Fuel tanks.
Title 14 - Aeronautics and Space
Each turbine powered transport category airplane operated after October 30, 1991, must meet the requirements of §25.963(e) of this chapter in effect on October 30, 1989. [Doc. No. 25614, 54 FR 40354, Sept. 29, 1989]
Title 14: Aeronautics and Space
PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS
Subpart K—Instrument and Equipment Requirements
§ 121.316 Fuel tanks.