Personnel, when working in a location such that, in the event of a fall, they would likely fall into water, shall wear a work vest that meets the requirements of 33 CFR 146.20 or a life preserver that meets the requirements of 46 CFR 160.002 , 160.005 , or 160.055 , except when using the safety belts and lifelines required by § 142.42 .
33 C.F.R. §142.45