Depending on why a supplier is on the debarment list, contracting authorities either must exclude them or may exclude them from procurements.
Gan ddibynnu pam mae cyflenwr ar y rhestr rhagwaharddiadau, bydd naill ai'n rhaid i awdurdodau contractio eu gwahardd neu gallant eu gwahardd rhag cymryd rhan mewn caffaeliadau.