This subsection shall not apply to sirens or other sound emitting devices placed in service before July 16, 1992, and located in municipalities with a population of less than 25,000 persons and with a population density of more than 2,500 persons per square mile, according to the latest federal decennial census.
Nothing in this subsection shall have the effect of restricting the use of a siren or other sound emitting device to alert the public of an emergency pursuant to the provisions of the emergency management act, P.L. 1942, c.251 (C.App. A:9-33 et seq.), or any applicable federal laws or regulations pertaining to emergency planning and preparedness.
N.J.S. § 13:1G-4.2