For the purposes of this Directive, the following definitions apply:

(1) "supply, works and service contracts" means contracts for pecuniary interest concluded in writing between one or more contracting entities and one or more economic operators and having as their object the execution of works, the supply of products or the provision of services;

(2) "works contracts" means contracts having as their object one of the following: (a) the execution, or both the design and execution, of works related to one of the activities within the meaning of Annex I; (b) the execution, or both the design and execution, of a work; (c) the realisation by whatever means of a work corresponding to the requirements specified by the contracting entity exercising a decisive influence on the type or design of the work;

(3) "a work" means the outcome of building or civil engineering works taken as a whole which is sufficient in itself to fulfil an economic or technical function;