Lester wrote:As far as I know, Appendix E can be changed by SIs, including E8.
I'm not so sure about that Lester... I mean, sure, I do believe that SIs can amend RRS (in general)... However, SIs cannot amend CRs (except with written permission of the ICA, I think?) and C.8.3 clearly states that "Identification shall comply with the RRS." (not RRS as modified by SIs or any other possible exception)... So, it seems pretty clear that, as far as identification on sails are concerned, CRs (which cannot be amended by SIs) will force a fallback to the original RRS verbiage regardless of what you put in the SIs...
In general, I would tend to think that if RRS is invoked by CRs then the applicable referenced rules cannot be amended by SIs... However, I do think C.8.3 is the only such instance (in Part II or CRs).
Besides, as John astutely pointed out, this is NOT the kind of rule you'd want to arbitrarily amend in SIs - it may be bad enough for some people to have to remove/erase leading zeros (once) but to have to put it back/take it off based on the regatta and what's written (or not written) in the SIs would be much worse...
Marko