14 C.F.R. § 23.237 Operation on water.
Title 14 - Aeronautics and Space
A wave height, demonstrated to be safe for operation, and any necessary water handling procedures for seaplanes and amphibians must be established. [Doc. No. 27807, 61 FR 5192, Feb. 9, 1996]
Title 14: Aeronautics and Space
PART 23—AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES
Subpart B—Flight
Ground and Water Handling Characteristics
§ 23.237 Operation on water.