Essentially, I agree with Monsieur Jobin's point that regardless of whether you're putting your own noise limits into the law or whether you're referencing the World Health Organization, the law has to have deadlines for them when there is a dispute. When someone makes a complaint, there has to be someone independent, as was described by Monsieur Dalpé, to go out to judge whether or not there has been an infraction; if there has, there has to be a time limit on it. If there's no time limit on it, you could go on forever.
On October 17th, 2006. See this statement in context.