26. The Board shall advise the Minister on any matter which he refers to it. For that purpose it may receive and hear petitions and suggestions from the public. It must, when in the opinion of the Minister the importance of the matters submitted so requires, receive and hear petitions and suggestions from the public. The procedure of such public hearings shall be determined by a regulation of the Government which shall come into force on the day of its publication in the Gazette officielle du Québec.