Constitutions of Melfi applies to jurisdiction Kingdom of Sicily
The Constitutions of Melfi, or Liber Augustalis, were a new legal code for the Kingdom of Sicily promulgated on 1 September 1231 by Emperor Frederick II.  It was given at Melfi, the town from which Frederick's Norman ancestors had first set out to conquer the Mezzogiorno two centuries earlier. Originally a reform of the Assizes of Capua of 1220, themselves his reform of the Assizes of Ariano of 1140, the Constitutions formed the basis of Sicilian law for the next six centuries. 
The author of the Constitutions is purported to be Frederick himself, though Giacomo Amalfitano, Archbishop of Capua, appears as an influence as well. He was even reproved by the pope for accepting and advising clauses contrary to the wishes of the church. Traditionally, the work has been attributed to Pier delle Vigne, but it is almost certain that, while Frederick, Giacomo and Pier had their hand in it, the Liber is the product of months of work by a committee.
The Constitutions were written in Latin and translated into Greek before their promulgation. They were meant to apply, as with previous Sicilian law, to all the peoples of the realm: Lombards, Greeks, Saracens, Germans, Jews. The 253 clauses are divided into three books: