SI 2022/1173. The Greenhouse Gas Emissions Trading Scheme (Amendment) (No. 2) Order 2022. Comes into force 1st January 2023. The main changes made to SI 2020/1265 The Greenhouse Gas Emissions Trading Scheme Order 2020 are as follows. Where necessary for free allocation for installations, allowances may be created from the flexible share in addition to the annual cap. New values for the global warming potentials of certain greenhouse gases covered by the UK ETS are adopted for the 2023 and subsequent scheme. From 1 July 2024, verifiers of emission reports must be accredited to a new standard. New applicants for accreditation as verifiers must satisfy the new standard immediately, but verification opinions of verifiers accredited to either the old or the new standard may be accepted until 30 June 2024.