seek to ensure that the ratio of local government electors to the number of members of the council to be elected is, as nearly as may be, the same in every electoral ward of the principal area
ceisio sicrhau bod y gymhareb etholwyr llywodraeth leol i nifer aelodau'r cyngor sydd i'w hethol yr un fath ym mhob ward etholiadol yn y brif ardal, neu cyn agosed ag y bo modd