The Rosatellum bis is a parallel system, which act as a mixed system, with 36% of seats allocated using a first past the post electoral system and 64% using a proportional method, with one round of voting. The Senate and the Chamber of Deputies did not differ in the way they allocated the proportional seats, both using the D'Hondt method of allocating seats.Rosatellum, come funziona la legge elettorale e cosa prevedeRosatellum 2.0, tutti i rischi del nuovo Patto del Nazareno
