(a) It shall be unlawful for any employer willingly and knowingly to utilize any professional strikebreaker to replace an employee or employees involved in a strike or lockout at a place of business located within the City and County of San Francisco.
(b) It shall be unlawful for any professional strikebreaker willingly and knowingly to offer himself for employment to replace, or to replace, an employee or employees involved in a strike or lockout at a place of business located within the City and County of San Francisco.
(Added by Ord. 317-64, App. 11/30/64)