3. In any judicial district for which no investigation commissioner has been appointed under section 1, and in the remainder of the territory of Québec, the coroner shall be exofficio a fire investigation commissioner and the deputy coroners shall be exofficio deputy commissioners. Their competence shall extend to the judicial district or part of a judicial district in which they exercise their functions as coroner or deputy coroner.
In any judicial district for which an investigation commissioner is appointed under section 1, the coroner and the deputy coroners competent to act in such district shall be exofficio deputy commissioners for such district.