Under the 2013 Act, a council can either undertake a community review itself, or it can agree for the Democracy and Boundary Commission Cymru (the Commission) to undertake the review on its behalf.
O dan Ddeddf 2013, gall cyngor naill ai gynnal ei arolwg cymunedau ei hun, neu gall gytuno i Gomisiwn Democratiaeth a Ffiniau Cymru (y Comisiwn) gynnal yr arolwg ar ei ran.