Õhusõiduk tunnistatakse lennukõlblikuks, kui on tuvastatud, et see on projekteeritud, valmistatud, varustatud ja tehniliselt hooldatud vastavuses 1944. aasta Chicago rahvusvahelise tsiviillennunduse konventsiooni nõuetega.
When applying paragraph 2 (a) a Member State shall, subject to applicable laws and regulations, including those relating to airworthiness certification, accept on its national register, without any discriminatory fee and without delay, aircraft owned by nationals of other Member States and transfers from aircraft registers of other Member States.