Pupils and staff, being the subject of the data held, are ‘data subjects’ and as such have rights, protected by the act, with regard to the data held about them.
Fel testun y data a ddelir, disgyblion a staff yw 'testunau'r data' ac fel y cyfryw mae ganddynt hawliau, a ddiogelir gan y ddeddf, mewn perthynas â'r data a ddelir arnynt.