This edition of "Rules and Regulations for Tank Vessels" (CG-123) replaces the previous edition dated 1 January 1973, and is a direct reprint of Parts 30-40 of Title 46 of the Code of Federal Regulations. The CFR text of 1 October 1976, has been updated in this publication by inclusion of amendments to the regulations published in the Federal Register since that date. Pollution prevention regulations contained in Parts 151-159 of Title 33 are included as an appendix.

In applying these regulations to merchant vessels certain factors have to be considered, among which are the size of the vessel, the services in which the vessel is engaged, and the waters upon which the vessel is operated. In this regard, shipowners, operators, builders, vessels' operating personnel and other persons affected by the navigation and vessel inspection laws should familiarize themselves with the regulations contained in this pamphlet.