Section 108.697 - Buoyant work vests(a) Each buoyant work vest on a unit must be approved under Subpart 160.053 or Subpart 160.077 of this chapter.(b) Commercial hybrid PFD's carried as work vests must be-(1) Used, stowed, and maintained in accordance with the procedures set out in the manual required for these devices by § 160.077-29 of this chapter and any limitation(s) market on them; and(2) Of the same or similar design and have the same method of operation as each other hybrid PFD carried on board.CGD 78-174A, 51 FR 4351, Feb. 4, 1986