Local authorities need to take care also when a campaign is underway to influence local people in relation to a referendum to decide whether to have a directly elected mayor.
Mae angen i’r awdurdodau lleol ofalu hefyd pan fydd ymgyrch yn mynd rhagddi i ddylanwadu ar bobl leol mewn perthynas â refferendwm i benderfynu a oes angen maer a etholir yn uniongyrchol.