"A gang is a relatively durable, predominantly street based group of young people who: see themselves (and are seen by others) as a discernible group; engage in criminal activity and violence; and may lay claim over territory (this is not necessary geographical territory but can include an illegal economy territory); have some form of identifying structural feature; be in conflict with other, similar gangs."
Centre for Social Justice 2009:21.
Gang-involved and gang-associated
For the purposes of the MAST programme, the term gang-involved is used to describe those who view themselves, and are viewed by others, as a member of a gang and are actively involved in gang-related activities with other members. The authorities will know many, but not necessarily all of these young people.
The term gang-associated is used to describe those young people who have some form of association with a gang or gang-involved individuals, but do not see themselves, and are not seen by others, as members of that gang.