Article 3 3

(a)

in combustion plants which fall within the scope of Chapter III of Directive 2010/75/EU, and which comply with the emission limits for sulphur dioxide for such plants as set out in Annex V to that Directive or, where those emission limit values are not applicable in accordance with that Directive, for which the monthly average sulphur dioxide emissions does not exceed 1 700 mg/Nm3 at an oxygen content in the flue gas of 3 % by volume on a dry basis;

(b)

in combustion plants which do not fall under point (a), and the monthly average sulphur dioxide emissions of which does not exceed 1 700 mg/Nm3 at an oxygen content in the flue gas of 3 % by volume on a dry basis;

(c)

for combustion in refineries, where the monthly average of emissions of sulphur dioxide averaged over all combustion plants in the refinery, irrespective of the type of fuel or fuel combination used, but excluding plants falling under point (a), gas turbines and gas engines, does not exceed 1 700 mg/Nm3 at an oxygen content in the flue gas of 3 % by volume on a dry basis.