46 C.F.R. § 197.342 Buoyancy-changing devices.
Title 46 - Shipping
(a) A dry suit or other buoyancy-changing device not directly connected to the exhaust valve of the helmet or mask must have an independent exhaust valve. (b) When used for SCUBA diving, a buoyancy-changing device must have an inflation source separate from the breathing gas supply.
Title 46: Shipping
PART 197—GENERAL PROVISIONS
Subpart B—Commercial Diving Operations
equipment
§ 197.342 Buoyancy-changing devices.
