UNCLOS - The United Nations Convention on the Law of the Sea AND Nordstream

The United Nations Convention on the Law of the Sea was adopted in 1982. It lays down a comprehensive regime of law and order in the world's oceans and seas establishing rules governing all uses of the oceans and their resources.

Article 58 

Rights and duties of other States in the exclusive economic zone 

1. In the exclusive economic zone, all States, whether coastal or land-locked, enjoy, subject to the relevant provisions of this Convention, the freedoms referred to in article 87 of navigation and overflight and of the laying of submarine cables and pipelines, and other internationally lawful uses of the sea related to these freedoms, such as those associated with the operation of ships, aircraft and submarine cables and pipelines, and compatible with the other provisions of this Convention.

2. Articles 88 to 115 and other pertinent rules of international law apply to the exclusive economic zone in so far as they are not incompatible with this Part.

3. In exercising their rights and performing their duties under this Convention in the exclusive economic zone, States shall have due regard to the rights and duties of the coastal State and shall comply with the laws and regulations adopted by the coastal State in accordance with the provisions of this Convention and other rules of international law in so far as they are not incompatible with this Part. 

Article 59 

Basis for the resolution of conflicts regarding the attribution of rights and jurisdiction in the exclusive economic zone In cases where this Convention does not attribute rights or jurisdiction to the coastal State or to other States within the exclusive economic zone, and a conflict arises between the interests of the coastal State and any other State or States, the conflict should be resolved on the basis of equity and in the light of all the relevant circumstances, taking into account the respective importance of the interests involved to the parties as well as to the international community as a whole.

Jurisdiction related:

NOTE: 

The EEZ of Sweden and Denmark were not applied

 -> the jurisdiction falls under the owner of the pipeline who investigates:

Nordstream and Lack of Jurisdiction by Sweden and Denmark

NOTE:

This Rishi Sunak´s important paper 

which discusses low legal protection of maritime infrastructure:

Rishi Sunak´s 2017 report about vulnerability of subsea internet cables