It is appropriate to identify those services by reference to specific positions of the Common Procurement Vocabulary (CPV) as adopted by Regulation (EC) No 2195/2002 of the European Parliament and of the Council ( 19 ),) , which is a hierarchically structured nomenclature, divided into divisions, groups, classes, categories and subcategories. In order to avoid legal uncertainty, it should be clarified that reference to a division does not implicitly entail a reference to subordinate subdivisions. Such comprehensive coverage should instead be set out explicitly by mentioning all the relevant positions, where appropriate as a range of codes.