14 C.F.R. § 31.23 Flight load factor.
Title 14 - Aeronautics and Space
In determining limit load, the limit flight load factor must be at least 1.4.
Title 14: Aeronautics and Space
PART 31—AIRWORTHINESS STANDARDS: MANNED FREE BALLOONS
Subpart C—Strength Requirements
§ 31.23 Flight load factor.