(1) By means of a constitutional act and after consulting the regional councils, existing regions may be merged or new regions created, provided the population of any new region is at least one million, when it is so requested by as many municipal councils as represent at least one third of the population involved, and when the proposal has been approved by the majority of the involved population in a referendum.
(2) With the assent of a majority of the people of the province or provinces concerned, and of the municipality or municipalities concerned, expressed by means of a referendum, after consulting the regional council, a state law may allow provinces and municipalities which request it to be detached from one region and assigned to another.
