CFR > Title 33 - Navigation and Navigable Waters > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER N—OUTER CONTINENTAL SHELF ACTIVITIES (parts 140 to 147) > PART 144—LIFESAVING APPLIANCES > SUBPART 144.20—Requirements for U.S. and Undocumented MODU's (§144.20-1 to §144.20-5) > 144.20-1—Applicability.