days later on August 7, 1915. The department was reduced to the Division of Motor Vehicles within the Department of Finance in 1921. Under the Vehicle Act of 1923, the Division was authorized to appoint inspectors and traffic officers to enforce the Act. These personnel were spun off in 1947 into the Department of the California Highway Patrol. In 1929, the Division was transferred to the Department of Public Works (a descendant of the old Department of Engineering and an ancestor of Caltrans) and in 1931 DMV again became a full department. The DMV maintains a cadre of approximately 200 armed sworn state peace officers classified criminal investigators for enforcement duties relating to vessel or motor vehicle theft, vehicle or hull identification number and odometer fraud, chop shops, counterfeit or fraudulent DMV documents, disabled parking permit placard misuse, identity theft, unlicensed vehicle dealer ("curbstoner") and dismantler activity, out-of-state vehicle registration plate misuse to avoid California registration, internal employee investigations, etc. The DMV began collecting a statewide Vehicle License Fee in 1936, in lieu of the personal property tax that individual cities and counties previously levied directly on motor vehicles regularly garaged within their borders (hence its nickname as the "in lieu tax"). The nation's first modern "credit card style" driver's licenses were introduced by the California DMV in January 1991. The plastic-coated design featured innovations like digitized photos, color holograms, and magnetic information strips readable by law enforcement. In 2012, a bill introduced by California State Assemblyman Mike Gatto required the DMV to establish the California Legacy License Plate Program. This program allows California residents to order replicas of California license plates produced in the 1950s, 1960s, and 1970s. The original intent was for older cars to get new plates that matched the plate colors that the DMV issued for that car when it was new. Due to lack of applications, the program was opened to all cars. For a license plate style to enter production, it needed to receive 7,500 paid applications by the January 1, 2015, deadline. Only the 1960s style plate (yellow lettering on black background) received the required number of orders. The DMV began production of the 1960s style plates at Folsom State Prison in Summer 2015. Since 2015, more than a million illegal immigrants have been issued driver's licenses. Driver Handbook The California Driver Handbook is a booklet published by the California Department of Motor