Why is the prefix ‘1’ before a sail number required only on the mainsail?

Events Rules Sail Identification 
Question Details

In Appendix E8 G.1.5 (b) (4) requires the prefix ‘1’ before a mainsail number only. Why?


This is a drafting error in the Appendix E rule E.8.

The following addition to the Standard Sailing Instructions used by IRSA Members for their events should be made.


1.4  Racing rule E8 will be changed as follows:

Add new G.1.5 (a) (6) ‘with sufficient space in front of the sail number for a prefix ‘1’.’

Delete G.1.5 (b) (4).