Parishes, cantons and provinces comprised in their majority of indigenous, Afro-Ecuadorian, coastal back- country (montubio) or ancestral communities, peoples or nations may take up this special administration system following a referendum passed by at least two thirds of the valid votes. Two or more districts administered by indigenous or pluricultural territorial governments may integrate and form a new district. The law shall set forth the rules for the structure, operation and competences of such districts.