CALL MR 22              

Rule C2.9 Changes to the Rules of Part 2—when boats in different matches meet

Question
Yellow and Blue are sailing in one match and Red and Green in another. Green meets Yellow on the course and Green is the right-of-way boat. Is it permissible for Green to change her course so that Yellow has no need to change course to keep clear?

Answer
Yes, provided that the change of course by Green is 'consistent with complying with a rule and winning her own match.'
If Green clearly disadvantaged herself by her course change, then she would have broken rule C2.9.