To safeguard the mutual recognition of qualifications, certificates of qualification should be based on the competences necessary for the operation of craft.
Chun aitheantas frithpháirteach cáilíochtaí a choimirciú, ba cheart do theastais cháilíochta bheith bunaithe ar na hinniúlachtaí is gá chun árthaí a oibriú.