For which of the following may a union not discipline one of its members?

Question

Quizplus · Accepted Answer

A union cannot discipline a member for testifying in court against the union because such testimony is protected under the National Labor Relations Act (NLRA) as a form of concerted activity. However, the other choices, including walking off the job in an unsanctioned strike, working for wages below union scale, and spying for an employer, are all actions that can be subject to disciplinary action by a union.

For Which of the Following May a Union Not Discipline