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 "Italian presidential election, 1978"): As head of state of the Italian Republic, the President has a role of representation of national unity and guarantees that Italian politics comply with the Italian Constitution, in the framework of a parliamentary system.
Relevant evidence: No