As of September 9, 2014, workplace discrimination training is mandatory, as detailed in California Government Code Section 12950.1:

“12950.1. (a) An employer having 50 or more employees shall provide at least two hours of classroom or other effective interactive training and education regarding sexual harassment to all supervisory employees in California within six months of their assumption of a supervisory position. An employer covered by this section shall provide sexual harassment training and education to each supervisory employee in California once every two years. The training and education required by this section shall include information and practical guidance regarding the federal and state statutory provisions concerning the prohibition against and the prevention and correction of sexual harassment and the remedies available to victims of sexual harassment in employment. The training and education shall also include practical examples aimed at instructing supervisors in the prevention of harassment, discrimination, and retaliation, and shall be presented by trainers or educators with knowledge and expertise in the prevention of harassment, discrimination, and retaliation.”

The above section of the law is not the complete law, but if the business provides qualified training, the complete law should be explained in detail and all questions should be answered.