(a)

Directive 2009/81/EC of the European Parliament and of the Council of 13 July 2009 on the coordination of procedures for the award of certain works contracts, supply contracts and service contracts by contracting authorities or entities in the fields of defence and security, and amending Directives 2004/17/EC and 2004/18/EC (Text with EEA relevance) · European Union

for additional deliveries by the original supplier which are intended either as a partial replacement of normal supplies or installations or as the extension of existing supplies or installations where a change of supplier would oblige the contracting authority/entity to acquire material having different technical characteristics which would result in incompatibility or disproportionate technical difficulties in operation and maintenance. The length of such contracts, as well as that of recurrent contracts, may not exceed five years, except in exceptional circumstances determined by taking into account the expected service life of any delivered items, installations or systems, and the technical difficulties which a change of supplier may cause;

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Source: EUR-Lex (Cellar) · retrieved 2026-10-11 · Text as adopted (Official Journal); later amendments are not incorporated in this text.