CFR /  Title 33  /  Part 149  /  Sec. 149.327 What are the approval requirements for work vests and

All work vests and anti-exposure (deck) suits on a manned deepwater port must be of a buoyant type approved under:

(a) Approval series 160.053 as a work vest;

(b) Approval series 160.053 or 160.153 as an anti-exposure suit; or

(c) Approval series 160.077 as a commercial hybrid personal flotation device.