Generally revise laws related to watercraft.

This bill revises Montana laws governing watercraft by eliminating the requirement for a validation decal on motorboats and sailboats, while maintaining the need for a registration decal. It directly affects boat owners, operators, and county treasurers by simplifying the registration process and reducing administrative requirements. The legislation also updates definitions for key terms like "motorboat" and "vessel," amends accident reporting and right-of-way rules, removes the Boating Advisory Council, and repeals an outdated section of the code. These changes aim to streamline watercraft regulations without altering core safety standards or enforcement mechanisms.