On 27 October 2017, the Presidente della Repubblica Italiana (President of the Italian Republic, hereinafter President), Mr. Sergio Mattarella, refused to promulgate the law^[1] drafted and approved by the Parliament titled “Misure per contrastare il finanziamento delle imprese produttrici di mine antipersona, di munizioni e sub munizioni a grappolo” (Measures to combat the financing of firms manufacturing antipersonnel landmines, cluster munitions and submunitions, hereinafter Law no. 57)^[2]. In the Italian constitutional system, in order for a law to enter into force the President has to promulgate it, according to Article 73 of the Constitution. To this end, Article 74 confers the President the power to require that the law undergoes a new debate in the two Houses of the Parliament, expressing the reasons for such a request. As explained in the opinion sent to the Senato della Repubblica (Senate of the Republic) and the Camera dei Deputati (Chamber of Deputies), the President identified two problematic features of the law, which are here illustrated.