Complex sentence: The electoral system for the two houses of the Parliament was innovated in October 2017, replacing the "Porcellum" of 2005 and the "Italicum" of 2015, both modified by the Constitutional Court after judging them partly unconstitutional.
Split into simpler sentences: The electoral system for the Parliament was innovated in October 2017. The law regulates the election of the Chamber of Deputies and the Senate of the Repubic, replacing the "Porcellum" of 2005 and the "Italicum" of 2015, both modified by the Constitutional Court after judging them partly unconstitutional.