Part 1 of the guidance relates to all Welsh elections, including elections for Senedd Cymru, elections for members of councils of counties, county boroughs and communities in Wales and elected mayors.
Mae Comisiwn Ffiniau a Democratiaeth Leol Cymru yn adolygu’r trefniadau etholiadol ar gyfer y 22 prif gyngor, gan gynnwys y nifer o gynghorwyr a wardiau ym mhob ardal cyngor.