(a) Every health plan offered by a carrier shall set the cost-sharing payment that a covered person is required to pay for a covered prescription insulin drug at an amount that does not exceed $30 per 30-day supply of the prescription insulin drug, regardless of the amount or type of insulin needed to fill the covered person's prescription.
(b) Nothing in this section shall prevent a carrier from setting a covered person's cost-sharing payment for a covered prescription insulin drug at an amount that is less than the maximum amount permitted pursuant to subsection (a).
(c) No provider contract between a carrier or its pharmacy benefits manager and a pharmacy or its contracting agent shall contain a provision

• (i) authorizing the carrier's pharmacy benefits manager or the pharmacy to charge,

• (ii) requiring the pharmacy to collect, or

• (iii) requiring a covered person to make a cost-sharing payment for a covered prescription insulin drug in an amount that exceeds the amount of the cost-sharing payment for the covered prescription insulin drug established by the carrier pursuant to subsection (b).