The Department or other law-enforcement agency of the Commonwealth or any federal agency conducting a criminal investigation involving the manufacture of methamphetamine consistent with state or federal law may access data, records, and reports regarding the sale of ephedrine or related compounds. In addition, such information may be accessed if relevant to proceedings in any court, investigatory grand jury, or special grand jury that has been impaneled in accordance with the provisions of Chapter 13 (§ 19.2-191 et seq.) of Title 19.2. The Superintendent of State Police shall promulgate regulations, pursuant to the Administrative Process Act (§ 2.2-4000 et seq.), for the implementation of this section. Regulations adopted under this section shall be deemed a customary police function for purposes of subdivision B 6 of § 2.2-4002.