; and (ii) subject to the limitations under this subsection. (C) Restriction on law enforcement use The regulations or guidance issued to carry out actions authorized under subsection (n) by the Director may not be used by the Department of Justice, including the Federal Bureau of Investigation, to predicate a new investigation solely on the information contained in a subpoena issued under subsection (n). (4) Noncompliance If any person, partnership, corporation, association, or entity fails to comply with any duly served subpoena issued under this subsection, the Director may request that the Attorney General seek enforcement of the subpoena in any judicial district in which such person, partnership, corporation, association, or entity resides, is found, or transacts business. (5) Notice Not later than 7 days after the date on which the Director receives information obtained through a subpoena issued under this subsection, the Director shall notify the entity at risk identified by information obtained under the subpoena regarding the subpoena and the identified vulnerability. (6) Authentication Any subpoena issued by the Director under this subsection shall be authenticated by the electronic signature of an authorized representative of the Agency or other comparable symbol or process identifying the Agency as the source of the subpoena. (7) Remediation Upon successful identification of a vulnerability on a system owned or operated by the party or entity, the Director shall, upon request— (A) provide appropriate, detailed technical guidance to remediate, end, or mitigate the vulnerability identified by the subpoena; (B) provide appropriate, detailed technical guidance to prevent a recurrence or the vulnerability or a similar vulnerability in the future