Mo. Rev. Stat. § 333.091
All licenses or registrations, or duplicates thereof, issued pursuant to this chapter shall be displayed at each place of business.
(L. 1965 p. 522 § 9, A.L. 1981 S.B. 16, A.L. 2009 S.B. 1, A.L. 2011 H.B. 265 merged with S.B. 325)