Article 6b 2.

The measures taken by the Member States pursuant to paragraph 1 of this Article shall be limited to what is necessary to meet the filling trajectories, where relevant, and the filling targets. All measures taken pursuant to Article 6a(8) and (10) shall be clearly defined, transparent, proportionate, non-discriminatory and verifiable. They shall not unduly distort competition or the proper functioning of the internal market in gas or endanger the security of gas supply of other Member States or the Union. Member States shall inform the Commission and the GCG of those measures without delay.