San Francisco has become the first city in the United States to require that its companies provide their employees with paid parental leave. A new law, approved by the city's Board of Supervisors to come into force in 2017, mandates that firms over a certain size (with 50 employees at first, dropping to 20 in 2018) give new mothers and fathers six weeks of paid time off. Californian law already guaranteed that 55 percent of wages would be provided by a state disability program, but San Francisco's new rules mean that the remaining 45 percent will be provided by employers, up to a salary ceiling of $106,740 per year.