The Joint Illition Directorate was a special multi-discipline sect in charge of investigating crimes involving magic and, specifically, violations of the Ygwer Code.
Investigating violations of the Ygwer Code was tricky, so a special multi-discipline sect called the Joint Illition Directorate was formed to investigate crimes and present evidence to a tribunal court which consisted of five mages, one from each of the largest five schools: (Cleric's Guild, Draol, Eari, I'dunal, Runesworn). The Directorate was headed by an Archwitness from the I'dunal.
Procedure
Typically, the sect would investigate reports or look at cases thought to involve illicit acts. Much of this involved the use of perciperation; any personnel chosen to be a member of this sect was required to have some training in perciperation, so they could view evidence found by the sect's Archwitness. If at least three people corroborated that a crime had been committed, the culprit would be apprehended and brought before the tribunal. Official testimony would be presented, and any judges on the tribunal would have opportunity to verify the claims (through perciperation). Should the accused be found guilty, they would be sentenced either to imprisonment, which took place at Ke'phal Prison, or death.
Enforcement
Apprehending criminals was the exclusive domain of the Shajin Guard, a subsect of the Cleric's Guild of Shajin. The guard consisted of Guild Paladins. These paladins were also in charge of overseeing and guarding the prison.