2.2. Tiers for net calorific value (NCV) U.K.
Tier 1
:
The operator shall apply one of the following:
(a)
the standard factors listed in section 1 of Annex VI;
(b)
other constant values in accordance with points (d) or (e) of Article 31(1), where no applicable value is contained in section 1 of Annex VI.
Tier 2a
:
The operator shall apply country specific factors for the respective fuel in accordance with points (b) or (c) of Article 31(1).
Tier 2b
:
For commercially traded fuels the net calorific value as derived from the purchasing records for the respective fuel provided by the fuel supplier shall be used provided it has been derived based on accepted national or international standards.
Tier 3
:
The operator shall determine the net calorific value in accordance with Article 32 to 35.