The terms and conditions of a framework agreement may be modified in line with the requirements for contract modification for this regime (see contract modifications).
caniateir diwygio unrhyw ffurflen mewn cysylltiad â ‘thrafodiad yr effeithir arno’ (o fewn y cyfnod a ganiateir ar gyfer diwygio’r ffurflen dreth honno, er mwyn adlewyrchu’r dewis hwnnw.