1. For the purposes of this Directive, the professional activities of an architect are the activities regularly carried out under the professional title of 'architect'.
2. Nationals of a Member State who are authorised to use that title pursuant to a law which gives the competent authority of a Member State the power to award that title to Member States nationals who are especially distinguished by the quality of their work in the field of architecture shall be deemed to satisfy the conditions required for the pursuit of the activities of an architect, under the professional title of 'architect'. The architectural nature of the activities of the persons concerned shall be attested by a certificate awarded by their home Member State.