The law was written under the assumption that major constitutional reforms would have taken place by the time it came into force. The failure of the reforms in the 2016 constitutional referendum created unforeseen complications, as electoral law for the Chamber of Deputies and Senate were not harmonised. This was compounded by a January 2017 Constitutional Court ruling finding the "Italicum" partly unconstitutional. In October 2017, the "Italicum" was repealed by the Italian Parliament and replaced by the "Rosatellum". The "Italicum" is the first and only electoral law to have been approved by the Italian Parliament but never used in a general election.