Nick belongs to a labor union. he believes a few key people run the union by meeting secretly and making decisions without informing other members or allowing them to fully participate in the meetings. if nick's suspicions are correct, the union is violating provisions of the act.

The corrrect answer is : The Landrum-Griffin Act.

Explanation:

This labor Act has to do with the relationship between a union and its members along the way.  It protects people's interests and also grants some rights to union members' interests. It promotes democratic practices within labor organizations as well.  In this case, it has been violated because Nick is hiding important information during the secret meetings.

answer; membership group;