Among these there was also the "Società Nazionale per la coltivazione di miniere in Sardegna" of Genua that tried in vain to achieve general concession. This kind of concession was in fact formally forbidden by the new act, in order to prevent the establishment of monopolies in mining industry. The project of the National Society came to nothing. The opening of a great number of companies was marked by the same protagonists of the project of the National Society, in order to hold anyway the majority of the highest possible number of permits. The majority of mining societies operating in Sardinia depended then on a non-Sardinian capital money. A remarkable exception was the Sardinian manager Giovanni Antonio Sanna, who achieved in 1848 a perpetual concession on about 1200 hectares located in the area of Montavecchio.