2020. Omnibus laws do not breach the principle of legal certainty per se. Indirect unconstitutionality on the grounds of basic State legislation infringement: Commentary on Constitutional Court’s Judgement 161/2019, of December 12, on appeal of unconstitutionality 878/2019 (BOE num. 10, of January 11, 2020). Journal of the Cortes Generales. 108 (Jun. 2020), 377–396. DOI:https://doi.org/10.33426/rcg/2020/108/1497.