CFR›Title 46›Chapter II›Part 393›Subpart B ContainsSections 393.2–393.3CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart B—Marine Highway Route and Project Designations Sections 393.2 § 393.2 Marine Highway Routes. 393.3 § 393.3 Marine Highway Projects. Previous A Subpart A—General Provisions Next C Subpart C—Department of Transportation Efforts To Foster and Support America's Marine Highways