The law fails to clarify limits to the scope of power of the minister in charge of the investments, resulting in a degree of unpredictability for citizens that is unconstitutional, the court said in the resolution which prohibits the legislation from entering into force.

Construction and Transport Minister János Lázár had said the law, originally slated to come into effect on August 1, would ensure predictability for building companies while aiming to improve sustainability, reduce environmental footprints and boost cost-efficiency.

 President Katalin Novák had turned to the Constitutional Court over the law, following its approval, because of concerns it could violate the principle of legal certainty.