The purchaser shall indicate in the contract notice the minimum proportion of the contract value that the contractor will be required to subcontract in the form of a range comprising a minimum percentage and a maximum percentage which may not exceed 30% of the contract value.
The percentages must be proportionate to the subject and value of the contract and to the nature of the industrial sector concerned, in particular the level of competition prevailing in that sector and the relevant technical capabilities of the industrial base.