; and (8) take such other actions as are necessary and appropriate to effectively administer this Act, including issuing subpoenas requiring the attendance and testimony of witnesses and the production of documentary or other evidence from any place in the United States, administering oaths, taking or ordering the taking of depositions, ordering responses to written interrogatories, and receiving and examining witnesses. (c) Enforcement The Authority may issue an order directing compliance by any person or public employer found to be in violation of this section, and may petition any United States Court of Appeals with jurisdiction over the parties, or the United States Court of Appeals for the District of Columbia Circuit, to enforce any such final orders issued pursuant to this section or pursuant to regulations issued under this section, and for appropriate temporary relief or a restraining order. Any petition under this section shall be conducted in accordance with subsections (c) and (d) of section 7123 of title 5, United States Code. 6. Lockouts and employee strikes prohibited when emergency or public safety services imperiled (a) In general Subject to subsection (b), any employer, emergency services employee, or law enforcement officer to which section 5 applies may not engage in a lockout, strike, or any other organized job action of which a reasonably probable result is a measurable disruption of the delivery of emergency or public safety services. No labor organization may cause or attempt to cause a violation of this subsection. (b) No preemption Nothing in this section shall be construed to preempt any law of any State or political subdivision of any State with respect to strikes by emergency services employees or law enforcement officers. 7. Existing collective bargaining units and agreements The enactment of this Act shall not invalidate any certification, recognition, result of an election, collective bargaining agreement, or memorandum of understanding that— (1) has been issued, approved, or