1 . TRANSPORT - COMMON POLICY - ROAD HAULAGE OPERATOR - ADMISSION TO THE OCCUPATION - CONDITION OF PROFESSIONAL COMPETENCE - ESTABLISHMENT - DETAILED RULES - DISCRETIONARY POWER OF THE MEMBER STATES ( COUNCIL DIRECTIVE NO 74/561 , ART . 3 ( 4 )) 2 . TRANSPORT - COMMON POLICY - ROAD HAULAGE OPERATOR - ADMISSION TO THE OCCUPATION - CONDITION OF PROFESSIONAL COMPETENCE - DEFINITIVE EXEMPTION - SPECIFIC CASES ( COUNCIL DIRECTIVE NO 74/561 , ART . 4 ( 2 )) 3 . TRANSPORT - COMMON POLICY - ROAD HAULAGE OPERATOR - ENGAGEMENT IN THE OCCUPATION - AUTHORIZATION BEFORE 1 JANUARY 1978 - CONDITION OF PROFESSIONAL COMPETENCE - PROOF - EXEMPTION - TRANSITIONAL PROVISION - SCOPE ( COUNCIL DIRECTIVE NO 74/561 , ART . 5 ( 2 )) 4 . TRANSPORT - COMMON POLICY - ROAD HAULAGE OPERATOR - ADMISSION TO THE OCCUPATION - CONDITION OF PROFESSIONAL COMPETENCE - PROVISIONAL EXEMPTION - SPECIFIC CASES - PHYSICAL INCAPACITY - CONCEPT ( COUNCIL DIRECTIVE NO 74/561 , ART . 4 ( 1 ))