Insurance, first of all. Third-party liability cover is compulsory for every motor pleasure craft in Italy and, says the Italian Insurance Code, the obligation is «extended to detachable engines, of any power, regardless of the craft to which they are fitted»: your 40 hp must be insured even if the RIB is not entered in any register. The safety equipment changes with the distance from the coast at which you sail: the table is the one in Annex V of the regulation, updated in October 2024, and it must be read for the navigation range you really use, not for the maximum range of the RIB.
The maximum number of people, for a CE-marked RIB, is the one written on the builder's plate and in the owner's manual: for the three NAVY boats on this page it is 6, 9 and 10. A natante is not registered, but it may be entered voluntarily in the Italian pleasure craft register: in that case it takes on the rules of an imbarcazione. And if you take it into foreign waters, to Corsica for example, you need on board the declaration of construction or import and the self-certification of ownership and nationality.
Anyone thinking of a small business needs to know a difference that matters. In bareboat hire (locazione in Italian), when the boat is handed over to a customer who drives it alone, the licence is required only in the cases of article 39, so with the 40 hp within 6 miles the customer does not need one, and the hirer hands over the essential operating instructions in writing. In charter (noleggio), where the boat remains under the control of whoever makes it available, the person at the helm must always hold a boat licence, even with the 40 hp. That is why, to those starting a bareboat hire business, we recommend the 5.50 or the 6.00 with the 40 hp outboard.