15. The publication of the decree in the Gazette officielle du Québec shall bar any contestation alleging the incapacity of the parties to the agreement, the invalidity thereof and the insufficiency of notices; and, in all other respects, it shall create generally a presumption, juris et de jure , establishing the legality of all proceedings relating to its adoption.
R. S. 1964, c. 143, s. 15.