By way of derogation from the provisions of article L. 4332-2, employees who have practised the profession of psychomotrician on a principal basis for at least three years during the ten years prior to the date of 8 May 1988 and who have passed, within three years of this date, the test of knowledge provided for by decree in the Conseil d’Etat, may practise the profession of psychomotrician and use the title of psychomotrician, with or without a qualifier.