Since ports are constituted of limited geographical areas, the number of providers of port services could, in certain cases, be subject to limitations relating to the scarcity of land or waterside space, the characteristics of the port infrastructure or the nature of the port traffic, or the need to ensure safe, secure or environmentally sustainable port operations.
Ós rud é gur limistéir theoranta gheografacha atá sna calafoirt, d’fhéadfadh líon na soláthraithe seirbhísí calafoirt, i gcásanna áirithe, a bheith faoi réir teorannuithe a bhaineann le ganntanas talún nó spás cois uisce, tréithe bhonneagar an chalafoirt nó cineál thrácht an chalafoirt, nó an gá atá ann a áirithiú go mbeadh na hoibríochtaí calafoirt slán, sábháilte agus inbhuanaithe ó thaobh an chomhshaoil.