In case of a gas undertaking performing transmission, distribution, storage or liquefied natural gas (LNG) activities and which is separate in its legal form from those undertakings performing production and/or supply activities, the designated system operators may be the same undertaking owning the infrastructure.
Če je podjetje plinskega gospodarstva, ki opravlja dejavnosti prenosa, distribucije in skladiščenja plina ali utekočinjenega zemeljskega plina (UZP), po svoji pravni obliki ločeno od podjetij za proizvodnjo in/ali dobavo plina, so lahko imenovani upravljavci omrežij ista podjetja, ki so lastniki infrastrukture.