Castrol has established a governance process for reviewing the qualifying criteria. This includes technical experts from across the business reviewing the proposed basis for any new criteria and making recommendations for endorsement by Castrol's leadership team. In 2022 Ricardo performed an independent review of our 2021 qualifying criteria, many of their recommendations have been incorporated into this update. [...] The criteria in this document will be kept under review and revised when Castrol considers it necessary due to changing circumstances and at least annually.