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"): The President of the Italian Republic (Italian: "Presidente della Repubblica Italiana" ) is the head of state of Italy and, in that role, represents national unity and guarantees that Italian politics comply with the Constitution.
Relevant evidence: Yes