Section 10 establishes that verification shall be conducted to confirm A-LCA results comply with the Resolution while ensuring transparency and consistency. For levels 1, 2, 3 and 4, a critical review shall be conducted according to ISO 14040:2006 paragraph 7 with additional focus on compliance. The verification statement shall be available on published A-LCA study reports. Verification covers methodology applied, input data used, interpretation of results, interpretation of robustness, reporting in background reports, and checking numerical calculation results. For levels 1 and 2, LCA practitioners should decide whether to perform internal or external critical review; for levels 3 and 4, external third-party review is mandatory. For levels 3 and 4, verification shall be conducted at OEM level and shall include definition of the LCA group and choice of representative vehicle. Verification at OEM level shall build on verifications of suppliers’ input data without re-verifying these data. The OEM’s LCA calculation system verification shall include data collection, internal sources, assumptions, calculation processes and tools applied. In case an LCA calculation system is verified and verification remains valid, no reverification is required for subsequent LCA studies based on that verified system. OEMs and suppliers shall make system verification statements available to contracting parties upon request.