California Code, Revenue and Taxation Code - RTC § 1365

(a) The county assessor and the employees of the assessor's office shall not engage in any gainful profession, trade, business or occupation whatsoever for any person, firm, or corporation, or be so engaged in their own behalf, which profession, trade, business, or occupation is incompatible or involves a conflict of interest with their duties as officers and employees of the county. Conflict of interest shall include receipt of compensation or gifts from private persons or firms for advice or other services relating to the taxation or assessment of property.

(b) If the board of supervisors or the Attorney General finds that the assessor has violated any of the provisions of subdivision (a), such violation shall constitute malfeasance in office on the part of the assessor.

(c) If the assessor or the Attorney General finds that any of the employees of the assessor's office has violated any provision of subdivision (a), such violation shall be grounds for dismissal of such employee by the assessor.