From the principle of non-regression to the obligation to step forward – the evolution of the Hungarian Constitutional Court’s environmental practice¹
Author: Sándor Szemesi
With its Decision 5/2025. (VI. 30.) AB of the Constitutional Court of Hungary, the so-called ‘climate decision’ (klímahatározat), the Hungarian Constitutional Court joined the camp of national (and international) courts that have formulated a forward-looking legal position in relation to the protection of the climate: the climate decision goes beyond the principle of non-retrogression (non-regression, or, in Hungarian literature, non-derogation) set out in the earlier Decision 28/1994. (V. 20.) AB of the Constitutional Court of Hungary, stating that in certain areas related to environmental protection, States are not only bound by the principle of non-regression, but also by an explicit obligation to step forward. The study reviews the relevant practice of the Hungarian Constitutional Court between 1994 and 2025, showing what legal considerations and international examples led to the statement of the obligation to step forward. The study argues that Decision 5/2025. (VI. 30.) AB of the Constitutional Court of Hungary, which declares the obligation to step forward, is of similar significance to Decision 28/1994. (V. 20.) AB of the Constitutional Court of Hungary, both at the national and international levels.