emissions data to be verified by a verification  body, in accordance with Chapter 4 of Part 3 of  this Order.  30th April 2025 The aeroplane operator and the verification  body must both independently submit, upon  authorisation by the aeroplane operator, the  verified Emissions Report and associated  Verification Report for 2024 to the Regulator in  accordance with article 35(3).  1st May 2025 to 31st July 2025 The Regulator must conduct an order of  magnitude check of the verified Emissions  Report for 2024 in accordance with article  35(4) including any filling in of data gaps in  case of non-reporting by aeroplane operators in  accordance with article 37(6) and (7). 30th June 2025 The Secretary of State must notify ICAO of any  change in the decision by the government of the  United Kingdom to voluntarily participate, or to  discontinue the voluntary participation, in the  applicability of CORSIA’s offsetting  requirements under Part II, Chapter 3 of  Volume IV of Annex 16 to the Chicago  Convention from 1st January 2026 in  accordance with article 7(1). 31st July 2025 The Secretary of State must submit required  information regarding CO$_{2}$ emissions for 2024  to ICAO in accordance with article 33(3). 1st August 2025 The Regulator must obtain and use the ICAO  document entitled “CORSIA States for Chapter  3 State Pairs” applicable for the 2026  compliance year.  31st October 2025 The Regulator must obtain and use the Sector’s  Growth Factor (SGF) for 2024 from the ICAO  document entitled “CORSIA Annual Sector’s  Growth Factor (SGF)”.  30th November 2025 The Secretary of State must submit updates to  the list of aeroplane operators that are attributed  to the United Kingdom to ICAO in accordance  with article 8(5), as well as updates to the list of  verification bodies accredited in the United  Kingdom in accordance with article 11(3). 1st January 2026 to 31st December 2026 The aeroplane operator must monitor, in  accordance with Chapter 2 of Part 3 of this  Order, CO$_{2}$ emissions for 2026 from  international flights.  1st January 2026 to 30th April 2026 The aeroplane operator must compile 2025 CO$_{2}$  emissions data to be verified by a verification  body, in accordance with Chapter 4 of Part 3 of  this Order.  30th April 2026 The aeroplane operator and the verification  body must both independently submit, upon  authorisation by the aeroplane operator, the  verified Emissions Report and associated  Verification Report for 2025 to the Regulator in  accordance with article 35(3).  38