21 U.S.C. § 829a: Delivery of a controlled substance by a pharmacy to an administering practitioner

the controlled substance is delivered by the pharmacy to the prescribing practitioner or the practitioner administering the controlled substance, as applicable, at the location listed on the practitioner’s certificate of registration issued under this subchapter; by injection or implantation for the purpose of maintenance or detoxification treatment; or subject to a risk evaluation and mitigation strategy pursuant to section 355–1 of this title that includes elements to assure safe use of the drug described in subsection (f)(3)(E) of such section, including a requirement for post-administration monitoring by a health care provider; the pharmacy and the practitioner are authorized to conduct the activities specified in this section under the law of the State in which such activities take place; the prescription is not issued to supply any practitioner with a stock of controlled substances for the purpose of general dispensing to patients; except as provided in subsection (b), the controlled substance is to be administered only to the patient named on the prescription not later than 45 days after the date of receipt of the controlled substance by the practitioner; and notwithstanding any exceptions under section 827 of this title , the prescribing practitioner, and the practitioner administering the controlled substance, as applicable, maintain complete and accurate records of all controlled substances delivered, received, administered, or otherwise disposed of under this section, including the persons to whom controlled substances were delivered and such other information as may be required by regulations of the Attorney General. reduce the risk of diversion; or protect the public health. After the date on which the report described in section 3204(b) of the SUPPORT for Patients and Communities Act is submitted, the Attorney General, in coordination with the Secretary, may modify the number of days described in subsection (a)(5). Any modification under this subsection shall be for a period of not less than 7 days.