However, the presumption is that, by the age of 12, a child may have sufficient maturity to understand their rights and to make an access request themselves if they wish.
Fodd bynnag, ceir rhagdybiaeth y gall plentyn, erbyn iddo droi'n 12 oed, fod yn ddigon aeddfed i ddeall ei hawliau a gwneud cais am fynediad at ddata gan y testun os bydd yn dymuno.