Mafia`s 10 articles

In November 8, 10 articles for Mafian member were found in Italy. In November 5, a godfather of Sicilian Mafia was arrested and articles were found in his home. Contents of these articles was "I swear loyalty to the Mafia. If I betray it, my body will be done away with ( I will be killed.)" "Do not look at wife of our friends" "Respect your wives" "Who does something immoral will be boycotted from Mafian field" and so on. I thought this is interesting. Mafia also has some rules like Japanese Yakuza. I also thought people in any organizations need some rules. What do you think about this article?