Wrth adolygu’r trefniadau etholiadol, rhaid i’r Comisiwn wneud y canlynol:Ceisio sicrhau bod y gymhareb o etholwyr llywodraeth leol i bob aelod etholedig o’r cyngor yn debyg ym mhob ward etholiadol y brif ardal, neu mor debyg â phosibl,Rhoi sylw i’r ffaith ei bod yn ddymunol pennu ffiniau hawdd eu hadnabod ar gyfer wardiau etholiadol, sef ffiniau a fydd yn parhau felly,Rhoi sylw i’r ffaith ei bod yn ddymunol osgoi torri ar draws ymlyniadau lleol wrth bennu ffiniau ar gyfer wardiau etholiadol.
In conducting electoral arrangement reviews the Commission is required to:Seek to ensure, that the ratio of local government electors to each elected  member of the council is, as nearly as possible, the same in every electoral ward of the principal area,Have regard to the desirability of fixing boundaries for electoral wards which are and will remain easily identifiable, and,Have regard to the desirability of not breaking local ties when fixing boundaries for electoral wards.