The Michigan Data Exchange is a cooperative effort among the Michigan State Police, Michigan Association of Chiefs of Police, and the Michigan Sheriffs' Association. Mi-DEx provides a means to electronically share records management, jail, citations, and other information on a state and federal level through the use of the National Data Exchange (N-DEx) system. All law enforcement agencies in Michigan are encouraged to participate as explained in a letter sent out jointly in June 2009. This letter was signed by the originating Directors of this initiative.