CMC Section 10.48.052 governs outdoor public events with music or amplification on nonresidential property: they require a city permit and are capped at 70 dBA daytime (max 3 hours), 60 dBA from 8-11 p.m., and 55 dBA other nighttime hours.
Cupertino Municipal Code Section 10.48.052 ("Outdoor Public Events") covers parades, rallies, fairs, concerts, and special promotional events on nonresidential property that generate above-normal noise via the human voice, public-address systems, musical instruments, or electronic amplification. Such events are allowed only with a city permit and are subject to these limits on any residential property: no more than 70 dBA for longer than three hours daytime; no more than 60 dBA from 8:00-11:00 p.m. and 55 dBA any other nighttime period; and no repeated peaks above 95 dBA where people are continuously exposed. Permit conditions may be stricter and, where they conflict, override the code. Backyard residential music has no separate section and falls under the general 10.48.040 and 10.48.060 limits.
Operating an outdoor event without a permit or beyond the CMC 10.48.052 limits violates Chapter 10.48, a misdemeanor punishable per CMC Chapter 1.12 (CMC 10.48.070). Permit conditions may be more restrictive and controlling.
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