The department shall promulgate rules for and administer the low-income disabled working person category of Medicaid eligibility in conformity with this subchapter with a state Medicaid plan amendment or waiver approved by the administration and in a manner that:
(1) Limits the population that may enroll in the low-income disabled working person category of Medicaid eligibility to eligible persons;
(2) Establishes premium and cost-sharing charges on a sliding scale based on income;
(3) Limits the services reimbursed to Medicaid-covered services furnished by providers enrolled as Medicaid providers;
(4) Limits reimbursements to the rates established by the department; and
(5) Provides for the automatic assignment of medical payments due as set out in §§ 20-77-302 and 20-77-307 as a condition of eligibility for benefits under the low-income disabled working person category of Medicaid eligibility.