46 CFR §2.85-1

Most U.S. vessels, and foreign vessels in U.S. waters are required to have load line assignments in accordance with 46 U.S.C. Chapter 51. The load lines marks, when placed on a vessel, indicate the maximum draft to which such vessel can be lawfully submerged, in the various circumstances and seasons applicable to such vessel. See subchapter E (Load Lines) of this chapter for applicable details governing assignment and marking of load lines.