General Part
Section 2.
Crime.
Chapter 7.
Complicity.
Article 41. Committal of crime by a group of individuals, by an organized group or by a criminal association.
4. A crime is considered committed by a criminal association, if it was committed by a consolidated organized group created to commit grave or particularly grave crimes, or by uniting an organized group for the same purposes, as well as if it was committed by a member (members) of the association to achieve his criminal purposes, as well as, committal of a crime by a person not considered a member of the association, by instruction of the criminal association.
Common purpose
Conspiracy
Contribution
EDIT.