There shall be no liability on the part of and no cause of action of any nature shall arise against any member insurer, its agents, or its employees, the association, its agents, or its employees, members of the board or the commissioner or his representatives for any action or omission by them in the performance of their powers and duties pursuant to this article. Such immunity shall extend to the participation in any organization of one or more other state associations of similar purposes and to any such organization and its agents or employees.