Når de territoriale myndigheder giver et privat selskab en kontrakt, indgås den ofte for en lang periode på indtil 30 år, således at konkurrence er udelukket, indtil kontrakten skal fornyes. ###>The contracts awarded by the territorial authorities to a private company are often concluded for a long period of up to 30 years so that competition is excluded until the con tract is to be renewed.