[POMPONIUS libro trigesimo nono ad Quintum Mucium. ] §19.5.11.prQuia actionum non plenus numerus esset, ideo plerumque actiones in factum desiderantur.
[POMPONIUS in the thirty-ninth book on Quintus Mucius.]\n\nBecause the number of actions was not complete, therefore in most cases actions on the case (actiones in factum) are required.
sed et eas actiones, quae legibus proditae sunt, si lex iusta ac necessaria sit, supplet praetor in eo quod legi deest: quod facit in lege Aquilia reddendo actiones in factum accommodatas legi Aquiliae, idque utilitas eius legis exigit.
But also, as for those actions which have been established by laws, if the law is just and necessary, the praetor supplies them in that which is lacking to the law; which he does in the Lex Aquilia by granting actions on the case adapted to the Lex Aquilia, and the utility of that law demands this.