Billy today in the sicilian mafia the commission was more a confederation that a centralized state; It happened because after Riina was arrested in 1993, Provenzano had to mediate between the faction that want to continue to fight against the state and the other faction that want to stop the bombing.
At the end Provenzano and his successor Messina Denaro are like a primum inter partes that a boss.

In the ndrangheta at the annuale meeting at polsi called crimine, is electra a capo crimine but his role is too settle dispute between the families.