The subject of natural monopoly turned

The natural monopoly entity appealed to the arbitration court with a request to invalidate the requirements of the antimonopoly body on concluding an agreement with the consumer in accordance with the quota established by the regulatory body of the natural monopoly, referring to the fact that the activities of natural monopolies are not subject to control by the antimonopoly authorities.
The arbitration court did not agree with the opinion of the subject of natural monopoly and denied the lawsuit. Article 5 of the federal law of March 22, 1991 No. 9488-1 “On Competition and the Limitation of Monopolistic Activities in Commodity Markets” prohibits business entities occupying a dominant position in the market from abusing this provision.
The natural monopoly entity appealed against this court decision, considering that the activities of natural monopoly entities are controlled by state regulatory bodies of natural monopolies and are not subject to prohibitions established by antitrust laws.
Give an opinion on the situation.