within the meaning of Article 555 of Regulation (EEC) No. 2454/93... is excactly that, and if you operating a flight that is within this regulation (i.e you boss if off to sign a multi million euro ship building deal) then it applies but we take care and explained to the boss that if he goes on a holiday then we dont produce the certificate, thus playing by the rules.
Those who dont play by the rules will ultimately bring it all down. Sadly this does not always work, we had a real hard time with the Greek Customs on this issue and now only pick up fuel there if it is required.
By the way I think it only applies within the EU, outside it does not work.
Matt