A formal letter means nothing in the context of strata.
The only notice that is enforceable is a Notice to Comply. It can only be issued for breach of a bylaw or the act.
It requires the approval of the committee to issue one. In the formal Notice to comply it is required to state time and date of the breach, as well as the bylaw or part of the act concerned.
So things like ” he is always noisy” are very non specific and would otherwise warrant a NTC.
It’s also up to the chairperson to control committee meetings. That can mean adjourning meetings if they get too rowdy, and 9ntrolling the amount of time each member speaks. Remember it’s not a shouting match, it’s a debate. It’s the majority one that carries the motion, not the volume of the arguments.