Article 41.

1.TIER DEFINITIONS FOR MEASUREMENT-BASED METHODOLOGIES

Measurement-based methodologies shall be approved in accordance with tiers with the following maximum permissible uncertainties for the annual average hourly emissions calculated in accordance with Equation 2 set out in section 3 of this Annex.

Table 1 Tiers for CEMS (maximum permissible uncertainty for each tier)

In case of CO₂, the uncertainty is to be applied to the total amount of CO₂ measured. Where the biomass fraction is determined using a measurement based methodology, the same tier definition as for CO₂ shall be applied to the biomass fraction.