Did he fully accept ? His ship hosted a "neapolitan" "board of officers".
Did he sign as chairman or partaker of the "board of officer", or did he officially only supply the courtroom ?
I am not even sure that Sicily and UK were allied, and I don't remember any delegation of authority from one country to the other, contrary to the arrangement at Toulon, and later in the portuguese army. To have a foreign officer interfering in army decision, without clear approval by both states, is quite strange.