(a) The rules in this book, including the Definitions, Race Signals, Introduction, preambles and the rules of relevant appendices, but not titles;
(b) ISAF Regulation 19, Eligibility Code; Regulation 20, Advertising Code; and Regulation 21, Anti-Doping Code;
(c) the prescriptions of the national authority, unless they are changed by the sailing instructions in compliance with the national authority’s prescription, if any, to rule 87;
(d) the class rules (for a boat racing under a handicap or rating system, the rules of that system are ‘class rules’);
(e) the notice of race;
(f) the sailing instructions; and
(g) any other documents that govern the event.
The fact that rules entail much more than the ones printed in the rulebook, is something we tend to forget. If you see the above list, the one who gives me headaches is the last one: (g) any other documents that govern the event. Up until now most sailors also forget that one, but I dread the moment that I have to disqualify someone for not parking his boat in the designated space or eating at the wrong table.
The one thing you can do, as a judge going to an event, is to make sure you read all of the above and specifically check them for biased or unreasonable rules. Most events on international level have a sailing instruction where the penalty for breaking none-racing related rules, is reduced and at the discretion of the jury. At least that means that you can avoid throwing someone out of a race when that is not warranted. If you find something that is clearly not intended, discuss it at the first jury meeting or with the chairman. There's always the notice board.
How are your experiences with this? Have you ever felt uncomfortable with a rule you had to enforce in "any other document that govern the event?"