State and federal law recognize a process, referred to as collective bargaining, in which an employer and a representative for its employees may negotiate on certain subjects relating to employment, with the intention of reaching an agreement. When successful, such an agreement is formalized in a written document called a collective bargaining agreement, sometimes referred to as a union contract or labor agreement. This issue brief provides an overview of the laws regarding collective bargaining for public and private sector employers and employees, as well as private sector employment associated with public funding or approval.