(c) Any amendment or variation to the Terms and Conditions must be in writing and signed by us and you in the same manner as the Contract (or as otherwise agreed by us in writing from time to time).
(c) Mae'n ofynnol i'r Buddiolwr gadw at unrhyw newidiadau a wneir i'r Contract hwn os bydd unrhyw amrywiad statudol neu addasiad i'r Rheoliadau ac yn dilyn hysbysiad gan Weinidogion Cymru.