Factors including convenient access to elected members by the electors and people they represent, patterns of settlements and ease of communications within electoral areas will be taken into account.
Gellid newid ffiniau wardiau cymunedol hefyd, ynghyd â threfniadau etholiadol cynghorau tref neu gymuned, er enghraifft nifer y cynghorwyr sy'n cael eu hethol i gynghorau.