What is the NLRB?
In its statutory assignment, the NLRB has two principal functions: (1) to determine, through [secret-ballot elections,] the free democratic choice by employees whether they wish to be represented by a union in dealing with their employers and if so, by which union; and (2) to prevent and remedy unlawful acts, called [unfair labor practices,] by either employers or unions. The agency does not act on its own motion in either function. It processes only those charges of unfair labor practices and petitions for employee elections that are filed with the NLRB in one of its 51 Regional, Subregional, or Resident Offices.