A - Class Constitution
B - Measurement Rules and Diagrams
Measurement Rules - Updated 1st August 2014
C - Championship Rules
Budget, Entry Fee and Cost
Committee, Safety and Other Boats
Notice of Race and Other Information
Points and Trophies
Notices to Competitors
Changes in Sailing Instructions
Signals Made Ashore
Schedule of Races
The Gate Start
Change of Course after the Start
Time Limit, Postponement and Abandonment
Declarations and Protests
Fixed Line Starts (code Flag Z)
There are also International Rules Committee (IRC) Rulings about what is legal and what is illegal under 505 class rules.
From time to time the IRC grants measurement dispensations.
Note: the versions on the Web incorporate rule changes since the last printed version of the rules was produced in 1997.