Article 4
The Commission shall adopt the following: (a) the necessary amendments to Annex I in the light of scientific and technical progress in the field of the use of solvents, their conditions of use and maximum residue limits; (b) the methods of analysis necessary to verify compliance with the general and specific purity criteria provided for in Article 3; (c) the procedure for taking samples and the methods for qualitative and quantitative analysis of the extraction solvents listed in Annex I and used in foodstuffs or food ingredients; (d) if necessary, the specific purity criteria for the extraction solvents listed in Annex I, and in particular maximum permitted limits of mercury and cadmium in the extraction solvents. The measures referred to in points (b) and (c) of the first subparagraph, designed to amend non-essential elements of this Directive, inter alia , by supplementing it, shall be adopted in accordance with the regulatory procedure with scrutiny referred to in Article 6(2). The measures referred to in points (a) and (d) of the first subparagraph, designed to amend non-essential elements of this Directive, inter alia , by supplementing it, shall be adopted in accordance with the regulatory procedure with scrutiny referred to in Article 6(3). Where necessary, the measures referred to in points (a) and (d) of the first subparagraph shall be adopted in accordance with the urgency procedure referred to in Article 6(4).