There are many areas in the U.S. that are considered "Inland" for licensing purposes, but where the International Rules apply (ex. all of Alaska
, Puget Sound). Do not confuse the COLREGS Demarcation Lines (Navigation Rules) with the Boundary Lines that the USCG uses for licensing/sea service
purposes. They are not the same. The Boundary Lines are defined in 46 CFR Part 7 and are not printed on charts
because they do not have any navigational significance.
As Doug pointed out, if it's in the book, it's fair game