The Department of Human Services, with funds appropriated for that purpose by the legislature, shall:
(1) Contract with each community developmental disabilities program to determine the eligibility of individuals to receive developmental disability services;
(2) Provide consultation and training to community developmental disabilities programs in determining eligibility for developmental disability services;
(3) Develop and periodically revise rules for determining eligibility for developmental disability services;
(4) Coordinate diagnostic evaluations statewide to minimize duplication of tests and examinations; and
(5) Provide consultation to appropriate agencies and individuals regarding persons evaluated to receive developmental disability services.