[F1CHAPTER IV U.K. PROVISIONS APPLYING TO AVIATION AND STATIONARY INSTALLATIONS]

[F2Article 13 U.K. Validity of allowances

Allowances issued from 1 January 2013 onwards shall be valid indefinitely. Allowances issued from 1 January 2021 onwards shall include an indication showing in which ten-year period beginning from 1 January 2021 they were issued, and be valid for emissions from the first year of that period onwards.]