From the HCA standard SI template:

15.6 Breaches of instructions [list SI section numbers related to safety] will not be grounds for a protest by a boat. This changes RRS 60.1(a). Penalties for these breaches may be less than disqualification if the protest committee so decides. The scoring abbreviation for a discretionary penalty imposed under this instruction will be DPI.

I have seen this modified for non-Hobie events to say:
Breaches of safety rules will not be grounds for a protest by a boat... (This would get you around prescriptions, class rules, etc. in case you forget to specifically list one: paddles, whistles, etc. sometimes show up in class rules.)

Here is the link: http://www.hcana.hobieclass.com/sit...urces/2009%20HCA-NA%20Standard%20SIs.doc

I wrote this SI template, based on RRS Appendix L and some Hobie traditions, and reviewed/tweaked by a team that included Matt Bounds, Irene McNeill, and other certified folks.

Hope this helps.

Mike