Is there a new official dress code for women?

The latest rumour is that women should have shoulders covered and dresses down to the knee. Is this a new official ruling or are existing rules just being more strictly enforced. A friend of mine was stopped in Villagio recently by CID who said her bare shoulders were inappropriate. They asked for her ID which she refused, leaving to get in her boyfriend's car. They obviously took his number because he got a phone call from the police later telling him and his girlfriend to report to the police station.