(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.
source: CGD 76-009, 43 FR 53683, Nov. 16, 1978, unless otherwise noted.
cite as: 46 CFR 197.342