If Italy is anything like Spain nobody gives a crap about building code stuff.
When I moved into my apartment it had just been "certified" by an electrician which took a week. There were outlets without covers on them. Exposed live stripped wires hanging in the hallway. Ground wire to the breaker box but not actually connected to the rest of the house. Exposed terminal blocks hanging everywhere. I doubt this "professional" even bothered to visit the place and just cashed a royal fee to sign the paperwork.
It's a total joke. If this crap gets "certified" then a DC cable beside an AC one In a conduit is really no issue :)