The following uses and activities shall be exempt from noise level regulations:
(A) Noises of safety signals, warning devices and emergency pressure relief valves;
(B) Noises resulting from any authorized emergency vehicle, when responding to an emergency;
(C) Noises resulting from emergency work, as defined in § 132.002 of this chapter;
(D) Any other noise resulting from activities of a temporary duration permitted by law for which a license or permit therefor has been granted by the city in accordance with § 132.004 of this chapter; and
(E) Any aircraft or railroad equipment operated in conformity with, or pursuant to state statute, federal law, federal regulations and traffic control instruction used pursuant to and within the duly adopted state or federal regulations. Any aircraft operating under technical difficulties, in any kind of distress, under emergency orders of air traffic control or being operated pursuant to and subsequent to the declaration of an emergency under federal air regulations shall also be exempt.
(Prior Code, § 13.02.030)