(1) An aircraft operator -

(a) may apply to the regulator to vary its emissions monitoring plan;

(b) must apply to the regulator to vary its emissions monitoring plan where required to do so by a condition of the emissions monitoring plan.

(2) A variation applied for under paragraph (1) is given effect by the regulator giving notice to the aircraft operator.

(3) Paragraphs (1) and (2) do not affect the operation of any condition of an emissions monitoring plan that allows an aircraft operator to make a variation without applying to the regulator.

(4) The regulator may, by giving notice to an aircraft operator, make any variation of the aircraft operator's emissions monitoring plan that the regulator considers necessary in consequence of a report made by the aircraft operator under Article 69(4) of the Monitoring and Reporting Regulation 2018.