According to the law on electoral polling, no opinion polls are to be published (or rather, “disseminated”) within the last fifteen days of the campaign. I presume the intent is so that voters aren’t influenced by polling and bounced into one of the two main effects (the band-wagon and under-dog effects respectively).

Of course, this only works if actors respect the law. Berlusconi doesn’t. Instead, he’s been leaking publicising polling info about a continued seven to nine point advantage for the PdL.