(a) Contact lenses may be sold only upon receipt of a written prescription or a copy of a written prescription and may be sold in quantities consistent with the prescription’s established expiration date and the standard packaging of the manufacturer or vendor. If the written prescription or a copy of it is not available to the dispenser, the dispenser shall confirm the prescription by direct communication with the prescriber or the prescriber’s authorized agent before furnishing, shipping, mailing, or delivering any lens, and maintain a record of the communication. A prescription shall be deemed confirmed upon the occurrence of one of the following:

1. (1) The prescriber or the prescriber’s agent confirms the prescription by communication with the dispenser.
2. (2) The prescriber fails to communicate with the dispenser within eight business hours after the dispenser requests confirmation, or the prescriber fails to communicate with the dispenser by the next business day on or before the same time of day that the dispenser requested confirmation, whichever is sooner. For purposes of this paragraph, “business day” means each day except a Sunday or a federal holiday.