Mo. Rev. Stat. § 253.095
In order to further the interpretive or educational functions of Missouri state parks, the director of the Missouri department of natural resources is authorized to enter into agreements with private, not-for-profit organizations that are organized to provide cooperative, interpretive, facility enhancement or educational services to any Missouri state park. The director may provide state park facility space and incidental staff support to such an organization under a cooperative agreement, which reimburses the department for the actual costs of such space and incidental staff support and clearly demonstrates the fiscal, interpretive, educational, and facility enhancement benefits to the state. Net proceeds received from the sale of publications or other materials and services provided by an organization pursuant to such an agreement entered into under this section shall be retained by the organization for use in the interpretive or educational services provided in state parks.
§ 253.095, RSMo