A more thorough explanation:

The Office of Labor–Management Standards (OLMS) is a division of the Employment Standards Administration in the U.S. Department of Labor. Its main responsibility is to enforce the Labor–Management Reporting and Disclosure Act of 1959, which sets standards for labor-union management and financial operations.

The Act provides union-members with certain rights, such as the right to fair elections of union leaders, the right to know about the union's administrative policies and financial transactions, and the right to have union funds safeguarded.

For example, if a union member suspects that their union is not holding fair elections for its leaders, they can file a complaint with the OLMS. The OLMS will then investigate the complaint and take action if necessary to ensure that the union is following the law.

The OLMS is one of four divisions within the Employment Standards Administration, which is responsible for administering various laws and programs related to employment standards, including minimum-wage and overtime standards, workers' compensation programs, and certification of employee protection for federally sponsored transportation programs.