Mo. Rev. Stat. § 36.110
After consultation with appointing authorities, the director shall allocate each position subject to this chapter pursuant to subsection 1 of section 36.030 and each position subject to this section pursuant to section 36.031 to the appropriate class therein on the basis of its duties, authority and responsibilities. The director may delegate allocation authority to the appointing authorities for positions in classes in their divisions of service within standards and limits which have been developed in consultation with and agreed to by the appointing authorities. Any employee affected by the allocation of a position to a class, whether by the director or by the appointing authority, shall, after filing with the director a written statement setting forth reasons for requesting a consideration thereof, be given a reasonable opportunity to be heard thereon by the director.
§ 36.110, RSMo