In order to award a defence or security contract, the purchaser may, in compliance with the rules applicable to the procedures defined in this Title, use purchasing techniques to pre-select economic operators capable of satisfying its needs or to enable tenders to be submitted or selected in accordance with specific procedures.
The purchasing techniques are as follows:
1° Framework agreements, which enable one or more economic operators to be pre-selected with a view to concluding a contract laying down all or part of the rules relating to orders to be placed during a given period. The duration of framework agreements may not exceed seven years, except in duly justified exceptional cases, determined taking into account the expected lifetime of the objects, installations or systems supplied, as well as the technical difficulties that a change of supplier may cause. Exceeding this period may, in particular, be justified by their purpose or by the fact that their performance requires investment that can be amortised over a longer period;
2° Electronic catalogues, which enable tenders or one of their components to be submitted electronically and in a structured form;
3° Electronic auctions, the purpose of which is to select bids electronically for a supply contract with a value equal to or greater than the formal procedure thresholds, allowing candidates to revise their prices downwards or modify the value of certain other quantifiable elements of their bids.