N.J. Stat. Ann. § 30:4D-22.1

2. Payments to pharmacies made by the "Pharmaceutical Assistance to the Aged and Disabled" program in accordance with section 3 of P.L.1975, c.194 (C.30:4D-22) shall not be made unless, at the time of each prescription drug purchase for which a pharmacy submits a claim, the pharmacy prominently displays on the receipt provided with the drug the usual price charged to other persons in the community by the pharmacy.