All non-EU students with a long-term Visa (more than 90 days) must apply for the Residency Permit within 8 days from their arrival in Italy.
All info available here
IMPORTANT INFO ABOUT THE RENEWAL OF THE RESIDENCE PERMIT
The Foundation Course Programme length is one academic year, from September to July/August in the following year.
At the moment it cannot last longer than one academic year.
In the event a student does not obtain 60 credits within the duration of the Foundation Course (FC) program and wishes to enrol to single courses to obtain the FC graduation certificate, our University can consider such a request but please do notice that the Police Immigration Office could not accept the enrolment to single courses as a valid proof for the renewal of the Residence Permit.
At the moment the Italian Law does not admit yet such a possibility, so the Police could reject your residence permit renewal request.
In such a case, a new visa is compulsory.
The issue and the renewal of the Residence permits does not depend on the university since it falls within the exclusive competence of the Immigration Office.