Mo. Rev. Stat. § 41.588
The governor is hereby authorized, upon recommendation of the adjutant general of Missouri, to present, in the name of the state of Missouri, a Missouri Vietnam campaign ribbon, which shall be of suitable design, as may be determined by the governor, to members of the Missouri National Guard who served on active duty in the United States military service at any time beginning February 28, 1961, through May 7, 1975. Not more than one Missouri Vietnam campaign ribbon shall be awarded or presented under the provisions of this section to any one person, nor shall such ribbon be awarded to or retained by any person whose entire service subsequent to their service described above shall not have been honorable. In the event of the death of any person during or subsequent to their service as described above who, in the opinion of the governor, as recommended by the adjutant general of Missouri, would be entitled to the Missouri Vietnam campaign ribbon, the same may be presented to the surviving primary next of kin.
§ 41.588, RSMo