(2) Equivalent procedures must demonstrably meet the requirements in Volume IV of Annex 16 to the Chicago Convention. 

## The CAA 

15. —(1) The CAA must provide such assistance and advice as a Regulator may require in connection with any of the Regulator’s functions under this Order. 

(2) The CAA is entitled to recover from the Regulator a sum equal to any expense reasonably incurred by it in providing the Regulator with assistance or advice under paragraph (1). 

## Change in aeroplane operator’s attribution to a State 

16. —(1) Where— 

## Aeroplane operator’s change in circumstances 

## CHAPTER 2 

(a) an aeroplane operator changes its ICAO Designator, air operator certificate or equivalent, or place of its registered office, and is subsequently attributed to a new State in accordance with paragraph 1.2 of Chapter 1, Part II, Volume IV of Annex 16 to the Chicago Convention, but 

(b) that aeroplane operator is not establishing a new entity or a subsidiary, 

this new State must become the State to which the aeroplane operator fulfils its requirements under Volume IV of Annex 16 to the Chicago Convention from the start of the next compliance period. 

(2) The aeroplane operator must notify the Regulator of any change described in paragraph (1) within 3 months of the change taking effect. 

(3) An aeroplane operator with a wholly owned subsidiary aeroplane operator that has its registered office in the United Kingdom can be treated as a single consolidated aeroplane operator liable for compliance with the requirements of Volume IV of Annex 16 to the Chicago Convention, subject to the approval of the Regulator. Evidence must be provided in the aeroplane operator’s Emissions Monitoring Plan to demonstrate that the subsidiary aeroplane operator is wholly owned. 

## Change in aeroplane operator’s registered office within the United Kingdom 

17. —(1) Where— 

(a) an aeroplane operator attributed to the United Kingdom under article 8(1) with a registered office or place of residence in the area of a Regulator, in a scheme year, changes the address of its registered office or place of residence to the area of a different Regulator (“R”), and 

(b) that aeroplane operator’s registered office or place of residence is in the area of R at the end of the scheme year, 

R is the Regulator of that aeroplane operator from the beginning of the next compliance period. 

(2) Where— 

(a) an aeroplane operator which did not have a registered office or place of residence in the United Kingdom at the beginning of a scheme year acquires a registered office or place or residence in the United Kingdom in the course of that period, and 

(b) at the end of that scheme year that registered office or place of residence is in the area of a Regulator (“S”), 

S is the Regulator of that aeroplane operator from the beginning of the next compliance period. 

(3) The aeroplane operator must notify the Regulator of any change described in paragraphs (1) and (2) within 3 months of the change taking effect. 

