Never heard of other bosses having to pay regular tribute to the Commission. I feel like that's something that would be well known by now. The closest I can think of his Gerry Angiulo having to cough up some money to Vito Genovese in 1959 but that sounded more like a one off payment.

What is the book like? John Scalish is one seriously underrated mob boss. Over 30 years in charge.