To ride a jet-ski it is required to:

have the boating license

Always wear and make the passenger wear a floating
Suit or a life belt;
Use the special launch-corridors for the departure and
return, proceeding at slow speed (not more than 3 knots)
keeping the exhaust tube under the water surface.

Navigate only during the day after verifying the sea and meteorological condition, between the minimum and maximum distance from the coast prescribed by the Ordinance of the local Capitaneria di Porto.