An Act Respecting End of Life Care came into force in the province of Québec, Canada on 10 December 2015.  This new law aimed to ensure that all adults with decisional capacity in Québec had access to the full range of health care options at the end of their lives including for the first time, medical assistance in dying (euthanasia). This chapter describes how the province’s medical regulator, the Collège des Médecins du Québec (CMQ), laid the groundwork for the passage of this law.  Although not necessarily setting out to play a role in law reform as such, the CMQ’s proposal to frame assisted dying as a therapeutic act enabled the legislator to introduce a bill which already had the support of the medical profession as well as a regulatory structure in place to guide practice.  This allowed the regulator to be more than a stakeholder in a process of law reform but a driver of reform itself.