++++ 1 . Free movement of goods - Quantitative restrictions - Measures having equivalent effect - Concept - Measures adopted by a professional body for pharmacy ( EEC Treaty, Art . 30 ) 2 . Free movement of goods - Derogations - Protection of public health - Rules prohibiting pharmacists from substituting a therapeutically equivalent medicinal product for that prescribed by the doctor - Whether acceptable ( EEC Treaty, Art . 36 )