(a) Offering drug collection by one or more of the following methods:

(i) On-site collection, dropbox, or receptacle meeting federal standards;

(ii) Mail-back collection by prepaid envelopes as authorized by federal law and regulation; or

(iii) Other federal drug enforcement agency approved methods of collection.

(b) Signage prominently displayed advertising such drug collection to consumers. 2. All drug take back program operators shall notify other potential authorized collectors of the opportunity to serve as an authorized collector for the drug take back program. Participation of authorized collectors besides pharmacies shall be voluntary. 3. All costs of pharmacies and other authorized collectors shall be paid or reimbursed by the manufacturer, jointly or individually, as part of the drug take back programs required by this article. 4. For any city with a population of one hundred twenty-five thousand or more as of the last decennial census, the commissioner shall establish by regulation a distribution plan that ensures that on-site collection receptacle or dropbox placement shall be reasonably accessible to all residents and that provides for program cost efficiency. 5. Pharmacies providing for mail-back collection as part of the drug take back program shall provide a voucher for a prepaid envelope upon dispensing a covered drug. Such voucher shall include information on drug take back and safe drug disposal methods.