a

with regard to the emission monitoring plan:

i

a change of emission factor values laid down in the monitoring plan;

ii

a change between calculation methods as laid down in Annex 3, or a change from the use of a calculation method to the use of estimation methodology in accordance with Article 54(2) or vice versa;

iii

the introduction of new source streams;

iv

changes in the status of the aircraft operator as a small emitter within the meaning of Article 54(1) or with regard to one of the thresholds provided by Article 28a(6) of Directive 2003/87/EC5;