The maintenance of an effective exemption for first time buyers requires the initial threshold to be reviewed periodically and adjusted, if necessary, in light of changing market values.
Er mwyn cynnal esemptiad effeithiol ar gyfer prynwyr tro cyntaf, mae angen adolygu'r trothwy cychwynnol o bryd i'w gilydd, a'i addasu, os oes angen, yng ngoleuni newidiadau yng ngwerth y farchnad.