Article 11 2.

Where the report indicates that the non-achievement of the indicative emission levels and emission reduction commitments referred to in Article 4 could be the result of ineffective Union source-based air pollution control legislation, including its implementation at Member State level, the Commission shall, where appropriate, investigate the need for further action also considering the sectoral impacts of implementation. Where appropriate, the Commission shall present legislative proposals, including new source-based air control pollution legislation, in order to ensure compliance with the commitments of this Directive.