; (2) improving the ability of States, Tribes, and units of local government to carry out such programs; and (3) carrying out the activities as described in section 101 of the STOP Fentanyl Act of 2023 . (b) Grant authorization The Attorney General, acting through the Director of the Bureau of Justice Assistance, may make grants to States and units of local government to improve surveillance of heroin, fentanyl, fentanyl-related substances, and associated synthetic drugs to enhance public health. (c) Grant projects To improve surveillance of seized heroin, fentanyl, and associated synthetic drugs Grants made under subsection (b) shall be used for programs, projects, and other activities to— (1) reimburse State, local, or forensic science laboratories to help address backlogs of untested samples of heroin, fentanyl, and associated synthetic drugs; (2) reimburse State, local, or other forensic science laboratories for procuring equipment, technology, or other support systems if the applicant for the grant demonstrates to the satisfaction of the Attorney General that expenditures for such purposes would result in improved efficiency of laboratory testing and help prevent future backlogs; (3) reimburse State, local, or other forensic science laboratories for improved, real time data exchange with the Centers for Disease Control and Prevention on fentanyl, fentanyl-related substances, and other associated synthetic drugs present in the local communities