(T)he RC was compelled by a competitor to file protest on a sailor wearing a CE vest.
I'd like to know how a competitor "compelled" the RC to protest. The RC may (permissive) protest a boat (60.2) and only shall (must) protest a boat when they "receive a report required by rule 43.1(c)(clothing weight) or 78.3 (class rule compliance)" (RRS 60.2)