Regulations in 49 chapters concerning the amount of tax (gabella or gabelle) and the conditions under which duty must be paid on internal and external trade in cloth of various kinds and from various sources; hides; various objects made of iron, steel, tin, lead, or brass; wood, worked or not, for various designated purposes; food including cheese, fish, oil, and wine; vessels of glass and clay; building materials such as plaster, tiles, and marble; domestic animals including horses; servants; and grain and other agricultural products, including herbs and spices. Also includes definitions of weights and measures and regulations on retail sale of wine, bread, and oil. The end of the text is missing (after f. 26v). The first and last leaves contain a variety of later additions, including many pen trials and rough sketches in ink (f. 1-2, 27-28). The original was written by the notary Neri ser Petri de Monte Alcino (f. 3r), but this manuscript is written by several hands.