Magic words to use in Italy

[Quijote]

Hi folks,
I'm looking for an expert on cruising Italy. Last year in Zihuatanejo, we met a circumnavigator who had spent a lot of time in Italy and he wanted me to know that there was a phrase you should use when approaching a new marina - something like "porto comunari". The result of this magic phrase was to get you reduced slip fees and sometimes a slip when otherwise nothing would be available. He explained that there is a law designed to provide access to boating facilities for the common man - not the mega-rich and by claiming "porto comunari" (or whatever it is), you would be entitled to "working-man" prices. He discovered this after some time in Italy and passed it on to me as a crucial piece of information. (He didn't seem totally to be a "working man" as he was cruising in a Swan.)
I however was in cocktail mode and have managed to forget the magic words.
So I request that you Italy experts find out what it is for me. We might be able to save money for a lot of us.
We are going to Italy next year and are looking for anything that allows us to stay longer, the dollar being what it is.
Thanks,
Richard Black
S.V. Saeta
Sailing Flamenco