Definicija: Določba o odprtosti omrežij (ONP) je opredeljena v Direktivi Sveta 90/387/EEC. Pogoji ONP trenutno veljajo za javna omrežja, ki delujejo na podlagi ekskluzivnih in posebnih pravic. V okviru ONP reforme, ki je predvidena kot priprava na polno liberalizacijo in odpravo ekskluzivnih in posebnih pravic, so sprožili razpravo o nadomestitvi meril glede posebnih/ ekskluzivnih pravic z drugimi merili, ki zadevajo večinsko tržno vlogo.

Definicija: The Open Network Provision concept is defined in Council Directive 90/387/EEC. ONP conditions currently apply to public networks operated under exclusive and special rights. In the context of the reform of ONP foreseen in anticipation of full liberalization and the lifting of exclusive and special rights, a debate has been opened on replacing the criteria of special/exclusive rights by other criteria concerning major market importance.