The pharmacist shall notify the nearest office of the Federal Drug Enforcement Administration if the prescribing individual practitioner fails to deliver a written prescription to him; failure of the pharmacist to do so shall void the authority conferred by this section to dispense a controlled substance without a written prescription of a prescribing individual practitioner.
28 Pa. Code § 25.46
This section cited in 28 Pa. Code § 551.3 (relating to definitions).