Which act imposes regulations on internal union affairs and the relationship between union officials and members?

The Labor Management Reporting and Disclosure Act (LMRDA) is the correct answer because it specifically establishes regulations governing the internal affairs of labor unions and outlines the relationship between union officials and their members. This act was designed to ensure transparency and accountability within unions, protecting the rights of union members and preventing corruption among union leadership. It mandates reporting requirements for union finances and activities, safeguarding members' interests by requiring that they have access to crucial information regarding their union's operations.

In contrast, the National Labor Relations Act (NLRA) primarily addresses the rights of employees to organize and engage in collective bargaining with their employers, focusing on the employer-employee relationship rather than internal union dynamics. The Employee Free Choice Act and the Union Representation Act also deal with aspects of union organizing and representation but do not impose regulations specifically on the internal affairs of unions or the relationship between union officials and members as the LMRDA does. Thus, the LMRDA is the most relevant statute for this context.