(c)
for combustion in refineries, where the monthly average of emissions of sulphur dioxide averaged over all plants in the refinery (excluding combustion plants which fall under the scope of (a)), irrespective of the type of fuel or fuel combination used, are within a limit to be set by each Member State, which shall not exceed 1700 mg/Nm3. Member States shall take the necessary measures to ensure that any combustion plant using heavy fuel oil with a sulphur concentration greater than that referred to in paragraph 1 shall not be operated without a permit issued by a competent authority, which specifies the emission limits.
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Source: EUR-Lex (Cellar) · retrieved 2026-11-05 · Text as adopted (Official Journal); later amendments are not incorporated in this text.