The United Kingdom Emissions Trading Scheme (the “UK ETS”) was established by the Greenhouse Gas Emissions Trading Scheme Order 2020 (the “UK ETS Order”). The purpose of the UK ETS is to limit, or to encourage the limitation of, the emission of greenhouse gases from certain activities during the ten “scheme years” beginning in 2021. Operators of certain industrial installations and certain aircraft operators are required to monitor, report on, and surrender “allowances” equivalent to, their greenhouse gas emissions in each scheme year. This Order expands the coverage of the UK ETS to include greenhouse gas emissions from certain maritime activities.