Question: The Districts of Trentino-Alto Adige/Südtirol are a subdivision of the two Italian autonomous provinces of Trento and Bolzano, they were established by a decree of the President of Italy on which date, the President of the Italian Republic,  is the head of state of Italy and, in that role, represents national unity and guarantees that Italian politics comply with the Constitution?
Sentence (from "President of Italy"): On 31 January 2015, the incumbent President, former Constitutional judge Sergio Mattarella, was elected at the fourth ballot with 665 votes out of 1,009.
Relevant evidence: No