Over the past ten years, there has been a roaring debate on the subject of the pronouncement by various sources regarding collective labour relations law. With the legislative body decreeing an ever-increasing minimum threshold of appropriate working conditions and the proliferation of specialized governing bodies responsible of ensuring its application, one of the underlying issues is the preservation of the group plan that is unique to North-American regime, held up by these three historic pillars: the monopoly of union representation, the existence of a collective agreement applicable to all employees included in the accredited unit, and the exclusive recourse to grievance arbitration for all misunderstandings that arise out of the application or interpretation of the said agreement. This article proposes to explore the various implications that are raised by the renewed dynamic that exists between the contractual essence of these collective labour relations and the entire labour legal system.