1 . FREE MOVEMENT OF PERSONS - FREEDOM OF ESTABLISHMENT - ARTICLE 52 OF THE TREATY - DIRECT EFFECT - PURPOSE ( EEC TREATY , ART . 52 ) 2 . FREE MOVEMENT OF PERSONS - FREEDOM OF ESTABLISHMENT - TAX LAW - RULES DRAWING A DISTINCTION ON THE BASIS OF THE MEMBER STATE OF RESIDENCE OR IN WHICH THE REGISTERED OFFICE IS SITUATED - ACCEPTABLE UNDER CERTAIN CONDITIONS - TAXATION OF COMPANY PROFITS - INSURANCE COMPANIES WHOSE REGISTERED OFFICE IS ON THE NATIONAL TERRITORY AND THOSE WHOSE REGISTERED OFFICE IS ABROAD - DIFFERENT TREATMENT IN REGARD TO AN ADVANTAGE RELATED TO TAXATION SUCH AS SHAREHOLDERS ' TAX CREDITS - NOT PERMISSIBLE ( EEC TREATY , ART . 52 ) 3 . FREE MOVEMENT OF PERSONS - FREEDOM OF ESTABLISHMENT - DISCRIMINATION - PROHIBITION - DISCRIMINATION IN REGARD TO TAXATION AGAINST INSURANCE COMPANIES WHOSE REGISTERED OFFICE IS IN ANOTHER MEMBER STATE LIMITED TO CERTAIN FORMS OF ESTABLISHMENT - NOT PERMISSIBLE ( EEC TREATY , ART . 52 , FIRST PARAGRAPH ) 4 . FREE MOVEMENT OF PERSONS - FREEDOM OF ESTABLISHMENT - TAX LAW - RULES CONCERNING TAXATION OF THE PROFITS OF INSURANCE COMPANIES WHICH DISCRIMINATE ON THE BASIS OF THE MEMBER STATE IN WHICH THE REGISTERED OFFICE IS LOCATED - JUSTIFICATION BASED ON THE ABSENCE OF HARMONIZATION OF THE LAWS OF THE MEMBER STATES - NOT PERMISSIBLE ( EEC TREATY , ART . 52 ) 5 . FREE MOVEMENT OF PERSONS - FREEDOM OF ESTABLISHMENT - RIGHTS CONFERRED BY ARTICLE 52 OF THE TREATY - UNCONDITIONAL NATURE - CONDITIONS OF RECIPROCITY - NOT PERMISSIBLE ( EEC TREATY , ART . 52 )