Cal. Bus. & Prof. Code § 128
Notwithstanding any other provision of law, it is a misdemeanor to sell equipment, supplies, or services to any person with knowledge that the equipment, supplies, or services are to be used in the performance of a service or contract in violation of the licensing requirements of this code.
The provisions of this section shall not be applicable to cash sales of less than one hundred dollars ($100).
For the purposes of this section, "person" includes, but is not limited to, a company, partnership, limited liability company, firm, or corporation.
For the purposes of this section, "license" includes certificate or registration.
A violation of this section shall be punishable by a fine of not less than one thousand dollars ($1,000) and by imprisonment in the county jail not exceeding six months.
Ca. Bus. and Prof'l. Code § 128