(19)For refinery combustion plants excluded from the scope of point (d) of Article 3(2) or point (c) of Article 3(3) of this Directive the emissions of sulphur dioxide averaged over such plants should not exceed the limits set out in Directive 2001/80/EC, or Annex V to Directive 2010/75/EU, or any future revision of those Directives. In the application of this Directive, Member States should bear in mind that substitution by fuels other than those referred to in Article 2 should not produce an increase in emissions of acidifying pollutants.