Section 35.03-5 - Approved types of work vests-TB/ALL(a) Each buoyant work vest carried under the permissive authority of this section must be approved under-(1) Subpart 160.053 of this chapter; or(2) Subpart 160.077 of this chapter as a commercial hybrid PFD.CGD 78-174A, 51 FR 4350, Feb. 4, 1986