It might prejudice the prevention and detection of crime, the prosecution or apprehension of offenders or the assessment or collection of any tax or duty to provide a copy.
Os gall hynny effeithio’n negyddol ar atal neu ganfod trosedd, erlyn neu ddal troseddwyr neu asesu neu gasglu unrhyw dreth neu ddyletswydd i gyflwyno copi.