Chapter 4-29 U.S. Department of State U.S. Dept. of State Effective September 1, 2007, the United States Department of State (DOS) began issuing a redesigned Diplomatic license plate. These plates are issued to qualified Diplomatic applicants by DOS, and NOT the Registry of Motor Vehicles. Persons inquiring about the United States Department of State plates should call or visit the United States Department of State’s Boston Field Office at 10 Causeway Street, Suite 10001, Boston, MA—617-565-8200. The photos below demonstrate the newly designed plate. Here is a brochure regarding Diplomatic plates. 9/07 4:147http://www.state.gov/documents/organization/17835.pdf