California Code, Public Utilities Code - PUC § 5506

(a) All commercial air operators shall comply with any requirement of a city, county, or city and county that the person obtain a business license as a condition for operating in that city, county, or city and county.

(b) All commercial air operators shall also provide the city, county, or city and county a currently effective certificate of insurance evidencing insurance coverage as required in Section 5503. A new certificate of insurance shall be provided to the city, county, or city and county at least annually or whenever there is a material change in insurance coverage. A city, county, or city and county shall give reasonable notice of this requirement with any business license renewal notification. A city, county, or city and county may charge a reasonable fee for purposes of carrying out the provisions of this subdivision.

(c) This section shall become operative on July 1, 2018.