Rocklin does not impose a stand-alone amplified-music decibel chapter. Outdoor music at private parties, restaurants, and events is governed by (1) Rocklin Municipal Code Chapter 9.40 'Disturbance Call Back Cost Recovery,' which charges responsible parties for repeat police calls to loud gatherings, (2) Cal. Penal Code §415 (disturbing the peace by loud and unreasonable noise — misdemeanor), and (3) General Plan Noise Element exterior compatibility standards (60 dBA Ldn residential 'normally acceptable'). Commercial venues with regular amplified entertainment generally require a Conditional Use Permit under Title 17 zoning, which includes site-specific noise conditions.
RMC Chapter 9.40 — the Disturbance Call Back Cost Recovery Ordinance — defines a 'disturbance' as 'parties, gatherings, and any other activities causing loud and unreasonable noise so as to constitute a threat to the peace, health, safety, or general welfare.' First response to a disturbance generates a written warning; subsequent police responses within a stated window can be billed to the person in charge of the premises and/or the owner, covering the actual cost of police personnel and equipment. The state-law backstop is Cal. Penal Code §415(2), which makes 'maliciously and willfully disturb[ing] another person by loud and unreasonable noise' a misdemeanor punishable by up to 90 days jail or $400. Commercial outdoor entertainment (restaurant patios with live music, brewery beer gardens, event venues) is permitted through Title 17 zoning conditional-use review; CUP conditions typically cap amplified-music hours (commonly ending at 10 p.m. Sunday–Thursday, 11 p.m. Friday–Saturday) and require compliance with General Plan Noise Element residential receiver standards. Special events on public property require a Special Event Permit through the City Clerk's office, which can attach noise conditions.
Chapter 9.40 disturbance cost recovery billing for repeat police responses (actual cost of officer time + equipment, assessed against the responsible party/owner). Cal. Penal Code §415 misdemeanor (up to 90 days jail / $400 fine). CUP violations can trigger CUP revocation hearings before the Planning Commission. Administrative citations under Title 1 may apply.
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