Missouri Revised Statutes § 253.185

*253.185. Domestic animals, how controlled — prohibited in buildings, exception — dog park, designated area. — 1. Except for the provisions of subsection 2 of this section, domestic household animals shall not be allowed in any state park unless restrained by a leash not longer than ten feet held by some person or firmly affixed to some stationary object so as to prevent the animal from ranging at large. No domestic household or other animal shall be allowed inside any state park building under the control of either the department of natural resources or a concessionaire licensed by the department of natural resources unless permission is granted by the department of natural resources. 2. The department of natural resources may designate a specified area within any state park to serve as a dog park or an off-leash area for domestic household animals. (L. 1971 H.B. 300 § 2, A.L. 2013 H.B. 28 merged with H.B. 650) Effective 8-28-13 (H.B. 28); 10-11-13 (H.B. 650) *H.B. 650 effective 10-11-13, see § 21.250. H.B. 650 was vetoed July 12, 2013. The veto was overridden on September 11, 2013.