The lines in this part delineate the application of the following U.S. statutes: 33 U.S.C. 152 relating to the length of towing hawsers; 33 U.S.C. 1201 et seq., the Vessel Bridge-to-Bridge Radiotelephone Act; 46 U.S.C. 5102(b)(6), which exempt from load line requirements certain vessels on domestic voyages; 46 U.S.C. 3301(6) requiring the inspection of seagoing barges which are defined in 46 U.S.C. 2101; 46 U.S.C. 3301(7) requiring the inspection of seagoing motor vessels which are defined in 46 U.S.C. 2101; 46 U.S.C. 3302(d) which exempts from inspection requirements certain vessels under 150 gross tons that operate within the waters of southeastern Alaska and the State of Washington; and 46 U.S.C. 8304, “Implementing the Officers' Competency Certificates Convention, 1936.”