CHAPTER II

VERIFICATION

Uncertainty assessment
Article 19
1
Where Regulation (EU) No 601/2012 requires the operator to demonstrate compliance with the uncertainty thresholds for activity data and calculation factors, the verifier shall confirm the validity of the information used to calculate the uncertainty levels as set out in the approved monitoring plan.
2
Where an operator applies a monitoring methodology not based on tiers, as referred to in Article 22 of Regulation (EU) No 601/2012, the verifier shall check all of the following:
a
whether an assessment and quantification of the uncertainty has been carried out by the operator demonstrating that the required overall uncertainty threshold for the annual level of greenhouse gas emissions pursuant to point (c) of Article 22 of that Regulation has been met;
b
the validity of the information used for the assessment and quantification of the uncertainty;
c
whether the overall approach used for the assessment and the quantification of the uncertainty is in accordance with point (b) of Article 22 of that Regulation;
d
whether evidence is provided that the conditions for the monitoring methodology referred to in point (a) of Article 22 of that Regulation have been met.
3
Where the aircraft operator is required, pursuant to Regulation (EU) No 601/2012, to demonstrate that the required uncertainty levels are not exceeded, the verifier shall check the validity of the information used to demonstrate that the applicable uncertainty levels as set out in the monitoring plan approved by the competent authority have not been exceeded.