Under the Italian law, if you are to obtain a student visa, you are allowed a part time job of 80 hours per month. It is against the law to work more than 81 hours in Italy with a student visa.
Florence Culinary School is a professional culinary school. The students will acquire a student visa certified by Italy and will be able to do restaurant interns with full accommodation for the whole period (Working in Italy: Italian cuisine training) so you are safe and assured.
It is the Italian Ministry of Education program.
http://www.florenceculinaryschool.com/chef/