A - Class Constitution

Class Constitution - 2009 rev (114 kB)

B - Measurement Rules and Diagrams

Measurement Rules 20100520 (76.24 kB 2010-06-08 16:54:19)

Diagrams (175.81 kB)

C - Championship Rules

Championship Rules (200.15 kB)

Application
Initial Criteria
Organisation
Entrees
Budget, Entry Fee and Cost
Regatta Measurement
Committee, Safety and Other Boats
Racing
Courses
Notice of Race and Other Information
Sailing Instructions
Points and Trophies

Standard Championship Sailing Instructions (35.51 kB)

Rules
Entries
Notices to Competitors
Changes in Sailing Instructions
Signals Made Ashore
Schedule of Races
Class Flag
Racing Area
The Course
Marks
The Gate Start
Recalls
Mark Boats
Change of Course after the Start
The Finish
Time Limit, Postponement and Abandonment
Declarations and Protests
Scoring
Alternative Penalties
Support Boats
not used
Propulsion
Radio Communication
Prizes
Fixed Line Starts (code Flag Z)

Summary of Rule Changes 1998-2007 (133.6 kB)

There are also  International Rules Committee (IRC) Rulings (158.37 kB) 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.