The public policy of this state is declared to be that a worker is free to decline to associate with the worker’s fellow workers and is free to obtain employment wherever possible without interference or being hindered in any way, but that the worker also has the right to association and organization with the worker’s fellow employees and designation of representatives of the worker’s own choosing. A contract made and entered into between an employer of labor and a worker or workers or any agent, bargaining agent, or representative of a worker or workers is binding and equally enforceable upon both parties to said contract. Elections by secret ballot held to determine the question of who is the bargaining representative of a worker or workers or whether a worker or workers shall strike against an employer must be free and impartial without being influenced by either an employer or worker or any third parties. Secondary boycotts and sympathy strikes are hereby declared to be against public interest and unlawful.