The testing methodology referred to in point (e) of Article 4(2) shall provide results that are verifiable, repeatable and comparable. It shall be capable of demonstrating in a realistic manner the CO₂ emissions benefits of the innovative technology with strong statistical significance and, where relevant, take account of the interaction with other eco-innovations.

The F1Secretary of State shall publish guidance on the preparation of testing methodologies for different potential innovative technologies meeting the criteria in paragraph 1.