Where use is made of the prerogatives provided for by law to recognise the existence of exceptional circumstances or to implement temporary measures to deal with such circumstances, and where these circumstances affect the procedures for awarding or the conditions of performance of a concession contract, a decree may provide for the application of all or some of the measures in this Book to concession contracts that are being performed, are in the process of being awarded or for which the award procedure has not yet been initiated.
The decree comes into force in all or part of the territory of the Republic where these provisions are applicable, for a period that may not exceed twenty-four months, the extension of which may be authorised by law.