Cal. MVC § 644.1

A Federal Service Ribbon may be presented by the Adjutant General to each person inducted into the federal service as a member of a California National Guard unit after September 15, 1940, and who has completed not less than a total of 12 months honorable service in the armed forces of the United States between September 15, 1940, and September 16, 1945, and to each person inducted into the federal service as a member of a California National Guard unit after August 1, 1950, and who has completed not less than a total of 12 months honorable service in the armed forces of the United States while the United States is engaged in war as defined in Section 18 of this code and to each person inducted into the federal service as a member of a California National Guard unit on or after October 1, 1961, and who has completed not less than a total of three months honorable service in the armed forces of the United States between October 1, 1961, and August 31, 1962.

The Federal Service Ribbon shall be prepared, designed, awarded and issued according to rules and regulations to be adopted by the Adjutant General and all applications therefor shall be in writing and filed in the office of the Adjutant General. The applicant shall have the burden of proof as to his military service and the decision of the Adjutant General, in case of dispute, shall be final.