The City of Sonoma does not operate a centralized 'no-knock' registry, but a clearly posted 'No Solicitors' or 'No Trespassing' sign at the entrance of private property creates a posted refusal of consent. Entry past such a sign is enforceable as trespass under California Penal Code §602(o) by Sonoma Police Department.
California law: Posted-sign trespass is codified at Cal. Penal Code §602(o), which makes it a misdemeanor to refuse to leave land after being asked, or to enter land posted against entry with signs at intervals of not less than three to the mile. Section 602(m) covers driving any vehicle on private property without consent. Sonoma framework: The Sonoma Municipal Code does not include a city-operated no-knock registry, but does authorize Code Enforcement and Sonoma Police Department to respond to repeated solicitor complaints. Commercial solicitors must also hold a City business license under SMC Ch. 5.04, and unlicensed solicitation can be cited under that chapter. State Do-Not-Call: The California Public Utilities Code §2874 and federal Telephone Consumer Protection Act (47 U.S.C. §227) restrict telemarketing but do not address in-person door-to-door soliciting. Constitutional limits: Permit requirements for non-commercial canvassing are unconstitutional under Watchtower v. Village of Stratton, 536 U.S. 150 (2002), so a posted-sign refusal is generally the homeowner's strongest legal protection.
Posted-sign trespass under Cal. Penal Code §602(o) is a misdemeanor punishable by up to 6 months in county jail and/or a fine up to $1,000. SMC Ch. 5.04 violations for unlicensed soliciting are subject to administrative citation and back-tax assessment.
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