California employers with 50 or more employees must provide sexual harassment prevention training to all supervisors in California. Training must take place within six months of hire or promotion and every two years thereafter. The minimum employee count of 50 includes part-time and temporary employees, including those who are hired through temporary staffing agencies, and independent contractors. The employer is covered if there are 50 or more employees employed each working day in any 20 consecutive weeks in the current or preceding calendar year. Because the law does not specify that the 50 employees must be within the state, it applies to California employers with 50 employees total, including those outside the state.