Final answer:
The Weingarten case applies to investigatory meetings for disciplinary action by allowing a union representative to be present.
Step-by-step explanation:
The Weingarten case applies to an investigatory meeting to obtain information that is the basis for disciplinary action by allowing a union representative to be present during the meeting. This right was established by the Supreme Court in the case of NLRB v. J. Weingarten, Inc. The case recognized that employees have the right to choose a representative from their union to accompany them to an investigatory meeting with management.