In some situations these amendments may be accepted, or lead to an enquiry, after which the amendment may be confirmed, rejected or reversed (if it had previously been accepted).
Mewn rhai sefyllfaoedd gall y gwelliannau hyn gael eu derbyn, neu arwain at ymholiad, ac wedi hynny gellir eu cadarnhau, eu gwrthod neu wrthdroi'r gwelliant (os oedd wedi'i dderbyn yn flaenorol).