decis februari condit form administr commiss european commun social secur migrant worker regard articl regul eec made respons deal administr question aris provis regul eec no decis publish offici journal european commun juli render unvalid entri forc regul eec no take account provis regul ground adopt decis fact essenti lai rule period time renew certif continu studi form apprenticeship certif form medic certif form laid continu famili allow normal ag limit circumst defin nation legisl appoint doctor qualifi issu medic certif decid certif school attend form requir quarter institut option requir certif year apprenticeship certif form requir quarter institut free requir certif month year medic certif produc children incap work form renew year issu medic certif mention paragraph doctor appoint liaison bodi doctor doctor treat patient decis publish offici journal european commun appli founder member state octob accord treati access april member state presid administr commiss doni