1. In the case of transport within the Union, discrimination which takes the form of carriers charging different rates and imposing different conditions for the carriage of the same goods over the same transport links on grounds of the country of origin or of destination of the goods in question shall be prohibited.

2. Paragraph 1 shall not prevent the European Parliament and the Council from adopting other measures pursuant to Article 91(1).

3. The Council shall, on a proposal from the Commission and after consulting the European Parliament and the Economic and Social Committee, lay down rules for implementing the provisions of paragraph 1.

The Council may in particular lay down the provisions needed to enable the institutions of the Union to secure compliance with the rule laid down in paragraph 1 and to ensure that users benefit from it to the full.

4. The Commission shall, acting on its own initiative or on application by a Member State, investigate any cases of discrimination falling within paragraph 1 and, after consulting any Member State concerned, shall take the necessary decisions within the framework of the rules laid down in accordance with the provisions of paragraph 3.