To the extent the principal Regulations are made under the European Communities Act 1972, they specify maximum levels of pesticides residues which may be left in crops, food and feeding stuffs in implementation of Council Directive 86/362/EC, Council Directive 86/363/EC and Council Directive 90/642/EC each as last amended by Commission Directive 97/71/EC. These Regulations, in implementation of Council Directive 97/41/EC, further amend the principal Regulations so as to make them applicable in respect of processed products and composite foods in so far as these are the subject of the Residues Directives. The Regulations also amend the principal Regulations so as to make provision with regard to the manner for determining whether the levels of pesticide residues left in any such dried or processed products or composite foods, so far as these are the subject of the Residues Directives, exceed the maxima permitted under the principal Regulations.