Indiana Code Title 9. Motor Vehicles § 9-28-4-1

Sec. 1. The bureau shall confer with officials of other states, commonwealths, and the District of Columbia for the purpose of agreeing upon establishing and maintaining fair, equitable, and satisfactory reciprocity arrangements and plans for the movement of motor vehicles from, to, and between the different state, commonwealth, and the District of Columbia of the United States and regulating the use of the same on the roads and highways of Indiana.

Notice of any act of the department required by law or department regulation to be given may be signed and given by the director or an authorized employee of the department and may be made personally or by mail. If made by mail, service shall be made in the manner prescribed by Section 1013 of the Code of Civil Procedure. In the case of service by mail, the service is complete at the time of deposit in the United States Post Office.