Helicopter Downlink Receiver Sites

The first justification is where the contracting authority wishes to buy additional or to partly replace existing goods, services or works which are the same or compatible with existing provisions (both those already supplied or that are contracted to be supplied). In this case, a direct award may be made where a change of supplier would result in the contracting authority receiving goods, services or works that are different from, or incompatible with, the existing goods, services or works, and that difference or incompatibility would result in disproportionate technical difficulties in operation or maintenance.