What degree or certifications do you need to teach ESL in Italy?

hi, i'm an american and i wanted to know if anyone knew what type of certification a person generally needs to teach english in an italian public school. I have a BA in linguistics with a minor in both spanish and french. I have tutored for ESL and french, and have taught english for a year in france. I speak some italian and have studied it for 2 years. can anyone give me some advice or tell me about their personal experience? thanks!