The state board of education shall adopt, after at least one public hearing has been held by the commissioner of education on each subsection of this section and upon his recommendation and, after consulting with recognized authorities in the field:

(1) Standards to be used throughout the state of Missouri in determining whether children shall be defined under sections 162.670 to 162.995 as “handicapped children” or “severely handicapped children”, together with regulations implementing these standards;

(2) Regulations governing evaluation and reevaluation of handicapped and severely handicapped children prior to and during assignment in a special educational program; provided, however, each child assigned to a special educational program shall be fully reevaluated on a regular basis;

(3) Standards for approval of all special education programs established under the provisions of sections 162.670 to 162.995 including, but not limited to, the qualifications of professional personnel employed in such programs and the standards to be used in determining the assignment of each child requiring special educational services to the program which best suits the needs of the child;

(4) Regulations determining the number of enrolled children which constitutes an approved special program including provision for approval by the state board of education of a program of less than the established number if, upon investigation by the state department of elementary and secondary education and upon the recommendation of the commissioner of education, it is found a special need exists;

(5) Regulations to be used in determining the eligibility of children in special education programs to attend less than a school day pursuant to section 167.031, RSMo 1969, and in determining the amount of state aid to be paid on a pro rata basis for part-time attendance or programs.