When certification of a representative of employees for collective bargaining purposes has been made by proper federal or state authority, it is unlawful during the effective period of such certification for any employee, representative of employees, or labor organization to conduct a strike or boycott against the employer of such employees or to picket any place of business of the employer in order, by such strike, boycott, or picketing to:
(1) deny the right of the representative so certified to act as such representative;
(2) prevent such representative from acting as authorized by such certification; or
(3) interfere with the business of the employer in an effort to do either act under clause (1) or (2).