Perhaps all of the above, Alexander. But one of the nice things about being a Don is that he can do anything he wants with any of his underlings, so an underboss's duties could be encompass anything. Using the Gambinos as an example: Neil Dellacroce, underboss to Carlo Gambino and Paul Castellano, ran the family's entire "blue collar" activites (loansharking, hijacking, strong-arm, dope, gambling). When he died , Castellano moved to make Tommy Bilotti his underboss--Bilotti's only duties were as Castellano's chauffeur and companion. When Gotti took over, he let Sammy Da Bull decide if he wanted to be called consigliere or underboss.