Mo. Rev. Stat. § 411.150: Fees, how fixed.

The director shall have full power to fix the fees for sampling, inspection, weighing, protein or other chemical analysis, and moisture testing or for additional services of whatever nature consistent with the provisions of this chapter, which fees shall be regulated in such manner as will, in the judgment of the director, produce sufficient revenue to meet the necessary expenses of the services of sampling, inspection, weighing, chemical analysis or moisture testing, and for administration and clerical work in connection therewith.