84.1. An agreement between the municipalities for the purpose of having a study carried out into the advisability of amalgamating their territories may be authorized by resolution, notwithstanding section 468 of the Cities and Towns Act (chapter C-19) and article 569 of the Municipal Code of Québec (chapter C-27.1). Such an agreement is not subject to sections 468.1 to 469.1 of the Cities and Towns Act, or to articles 570 to 624 of the Municipal Code of Québec.