Effective January 2011, California employers with 15 or more employees must provide paid leave to organ and bone marrow donors. In particular, organ donors must be provided a leave of absence of up to 30 workdays and bone marrow donors must be provided a leave of absence of up to five workdays. Employees must provide written verification that they are a donor and there is medical necessity for the donation when requesting leave.  

Employers may require that employees use vacation or sick leave for up to five days for bone marrow donors and two weeks for organ donors, unless it violates a collective bargaining agreement to do so. Leave under this statute does not run concurrently with FMLA or CFRA leave.