The Interprovincial Commission (Italian: Commissione interprovinciale), also known as "Regione", "commissione regionale" or "cupola regionale") is a governing body of the Cosa Nostra. It gathered only to deliberate important decisions about the Cosa Nostra interests between several provinces in the same territory that involved other crime families.[1]
Calderone was appointed to manage the commission: it was decided that only the mafiosi delegates of every Sicilian province, except Messina, Siracusa and Ragusa, had to participate in the commission. These delegates imposed the prohibition to execute kidnapping in Sicily in order to stop extortion abductions carried out by Corleone clan led by Leggio.[3]
According to the pentitoAntonino Calderone, at the beginning the "Regione" meetings occurred monthly in one of the several provinces, but hereafter they occurred always at the Michele Greco's farmstead in Ciaculli.[4]
In 1978 Calderone and Giuseppe Di Cristina were killed and the management of the "Commissione interprovinciale" went to Giuseppe Settecasi, but even him was murdered in 1981 during a mafia war in Agrigento province that saw the rising of the boss Carmelo Colletti, tied to Bernardo Provenzano, who became the new provincial delegate of Agrigento; so the management of the "Commissione interprovinciale" went to Greco, mafioso delegate of Palermo province because he managed the Cupola.[5][6]
