(a) Medicaid eligible persons shall pay the maximum allowable copayment under federal law or administrative regulation for each prescription drug received under the Medicaid Program, except for designated exemptions.
(b) Said maximum allowable copayment shall be collected by the dispensing pharmacy and credited against the Medicaid payment to the pharmacy for the drug.
(c) Designated exemptions include prescriptions for family planning drugs and those used in the treatment of persons participating in the Medicaid Early and Periodic Screening, Diagnosis and Treatment Program.
(d) The provisions of this section shall not be effective if they are found by a court of competent jurisdiction to contravene federal laws or federal administrative regulations applicable to the Medicaid Program.