Following the signing of the 1972 Convention on International Rules for the Prevention of Collisions at Sea, further efforts were made to harmonize and update the various rules governing inland navigation. These efforts culminated in the adoption of the Inland Navigation Rules Act 1980. This legislation contains Articles 1 to 38 – the main body of the regulation. Its five annexes have been published as regulations. It is important to note that, with the exception of Annex V of the Rules of Procedure, the International Rules and the Domestic Rules and Appendices are very similar in content and form. The date of entry into force of the inland navigation rules was 24 December 1981, with the exception of the Great Lakes, where the date of entry into force was 1 March 1983. In 2010, the Coast Guard was given the authority to transfer the rules of inland navigation from the United States Code into regulations. In this way, it is the Coast Guard that has the legal authority to make regulatory changes, not Congress. The Coast Guard`s Federal Advisory Council for Rules of Navigation is the Advisory Council on Navigation Safety (NASAC), formerly known as the Highway Traffic Act Advisory Committee. Select the cover to navigate the Coast Guard Navigation Centre. Click on “Navigation Rules” in the top tab to display the International Rules page International Rules are included in the Guide to Navigation Rules and Regulations, available on the CG Navigation Centre website. The manual replaces COMDTINST Rules of Navigation M16672.2D – International and National. International Regulations for the Prevention of Collisions at Sea, 1972 (72COLREGS) and United States Inland Navigation Rules The 72 COLREGS were developed by the Intergovernmental Maritime Consultative Organization (IMCO), which has since been renamed the International Maritime Organization (IMO).

IMO has adopted 86 amendments to COLREGS, most recently in 2014. Rules of navigation are regulations that help seafarers navigate safely, just as driving laws help vehicles navigate safely. Charts created by the National Ocean Service show the COLREGS demarcation line, which indicates when seafarers must follow the 72 COLREGS (outside the demarcation lines) or the inland navigation rules (within the demarcation lines). Professional seafarers must be familiar with traffic rules, but all seafarers must know and understand the rules. The rules are legally binding and their application makes waterways safer for all. As already mentioned, COLREGS apply to waters outside established shipping lines. The lines are called COLREGS demarcation lines and mark the waters on which seafarers must comply with domestic or international rules. COLREG`s boundary lines are listed in Title 33 of the Code of Federal Regulations, Part 80 (33 CFR 80), and in the Manual of Navigational Rules and Regulations. An explanatory diagram of the structure added at the beginning. The keywords and clauses have been highlighted with some explanations in order to achieve a better interpretation and understanding of the rules of procedure and annexes. The international rules were formalized in the 1972 Convention on the International Rules for Preventing Collisions at Sea and entered into force on 15 July 1977. The United States has ratified this treaty and all U.S.-flagged vessels must comply with these rules.

President Ford proclaimed the 72 COLREGS and Congress passed them as the International Rules of Navigation Act of 1977.