46 C.F.R. § 90.10-20 Liftboat.
Title 46 - Shipping
Liftboat means an offshore supply vessel with moveable legs capable of raising it's hull above the surface of the sea. [CGD 82–004a, 55 FR 2525, Jan. 25, 1990]
Title 46: Shipping
PART 90—GENERAL PROVISIONS
Subpart 90.10—Definition of Terms Used in This Subchapter
§ 90.10-20 Liftboat.