Government Code § 16645.3
CHAPTER 6. Prohibition on Use of State Funds and Facilities to Assist, Promote, or Deter Union Organizing
(a) No state contractor shall assist, promote, or deter union organizing by employees who are performing work on a service contract, including a public works contract, for the state or a state agency.
(b) A state contractor that violates subdivision (a) is liable for a civil penalty of one thousand dollars ($1,000) per employee per violation.