In another thread there was discussion about Inland Rules on Puget Sound
. When I started boating
in the 70s Inland Rules were the rules for Puget Sound
. It changed shortly after.
Coast Pilot 7 available online:
Part 80 COLREGS Demarcation Lines
Puget Sound and Adjacent waters:
COLREGS shall apply on all waters of Puget Sound and adjacent waters, including Lake Union, Lake Washington
Canal, and all tributaries.
All the major rivers are Inland Rules. Inland lakes like Lake Samamish are Inland rules.
On the other hand San Francisco
Bay is inland rules.