The port and maritime act stipulate that the port's capital and the companies belonging to the port authority, in accordance with the Act, shall be kept separate in a port fund, and will be only used for the development, maintenance, and operation of the port and the areas it operates.  The port capital will also be used in a way that ensures the company's solid economy.   

Lov om havner og farvann (havne-og farvannsloven)  https://lovdata.no/dokument/NL/lov/2019-06-21-70