; or (B) protect the public health. (2) Modifications after submission of report After the date on which the report described in subsection (c) is submitted, the Attorney General, in coordination with the Secretary, may modify the number of days described in subsection (a)(5). (3) Minimum number of days A modification under this subsection may not modify the number of days specified in subsection (a)(5) to fewer than 7. . (b) Study and report Not later than 2 years after the date of enactment of this Act, the Comptroller General of the United States shall conduct a study and submit to Congress a report on access to and potential diversion of controlled substances administered by injection, implantation, or through the use of an intrathecal pump. (c) Technical and conforming amendment The table of contents for the Comprehensive Drug Abuse Prevention and Control Act of 1970 is amended by inserting after the item relating to section 309 the following: Sec. 309A. Delivery of a controlled substance by a pharmacy to an administering practitioner. .