++++ 1. Free movement of goods - Quantitative restrictions - Measures having equivalent effect - Reservation of a proportion of a public supply contract to undertakings located in a particular region of the national territory - Not permissible (EEC Treaty, Art. 30) 2. Free movement of goods - Quantitative restrictions - Measures having equivalent effect - Measure which might be regarded as aid within the meaning of Article 92 of the Treaty - Applicability of the prohibition of measures having equivalent effect not thereby precluded (EEC Treaty, Arts 30 and 92)