Artikel 4

All public wireless telegraphy stations established or to be established by, or with the authorisation of, the Norwegian Government within the territories referred to in article I shall always be open on a footing of absolute equality to communications from ships of all flags and from nationals of the High Contracting Parties, under the conditions laid down in the Wireless Telegraphy Convention of July 5, 1912, or in the subsequent International Convention which may be concluded to replace it.
Subject to international obligations arising out of a state of war, owners of landed property shall always be at liberty to establish and use for their own purposes wireless telegraphy installations, which shall be free to communicate on private business with fixed or moving wireless stations, including those on board ships and aircraft.