“Royal decree-laws limits. The ‘extraordinary and urgent need’ requirement. Royal decree-laws legitimacy to regulate regulatory matters. Tax laws amendments by royal decree-laws. : Commentary on the Constitutional Court Judgment 14/2020, of January 28. Concerning action of unconstitutionality num. 2208-2019. (BOE num. 52, of February 29, 2020)”, RCG, no. 109, pp. 599–612, Dec. 2020, doi: 10.33426/rcg/2020/109/1541.