In an act that his critics described as another instance of Italian Prime Minister Silvio Berlusconi using his office to boost his media empire, the Italian government today introduced new regulations banning the sale of pay-per-view soft- and hard-core pornography during daylight hours. If approved by the Italian parliament, the measure is almost certain to spark new wrangling between Berlusconi, whose Mediaset empire includes Italy's largest privately owned TV network, and Rupert Murdoch, whose Sky Italia includes five pay-per-view porn channels that operate during the day and 22 that operate at night. In an interview appearing in a weekly supplement of the Rome newspaper Corriere della Sera , Mediaset Vice Chairman Pier Silvio Berlusconi, the prime minister's son, acknowledged that "there's a risk [of] ... war" with Sky Italia over the regulation.