The representatives appointed or chosen by the majority of workers in a unit suitable for this purpose for collective bargaining are the exclusive representatives of all workers in that unit for collective bargaining in relation to wages, wages, working time or other conditions of employment: provided that each worker or group of workers has the right , at any time, to make complaints to your employer and have those complaints adapted without the intervention of the negotiator. if the accommodation is not in contradiction with the terms of a collective agreement or contract that apply then: provided that the negotiator has been given the opportunity to participate in such an adjustment. Most private sector collective agreements are governed by section 9, point (a), of the National Labor Relations Act, and this section generally requires that a majority of employees in the collective agreement unit support them when a union represents them. The situation is different in the construction industry. In this sector, employment contracts are considered to fall under Section 8 F of the Act, which does not require such majority support. This issue before Nova Plumbing, Inc.`s D.C v. NLRB.3 The employer signed a collective agreement in that case containing the language of recognition of Section 9 (a) that corresponded to Central Illinois, but there was clear evidence that the union did not have a majority at the time of the signing of the agreement. The Court of Appeal objected to the enforcement of the House order. The Tribunal justified this decision by the fact that the authorization of a relationship under Section 9 (a) by the language of the contract alone, in which the actual facts are at issue, runs counter to the principle of the majority rule established by law. As in many areas of federal labour law, there are different rules for employers in the construction industry. How employers are unionized is a key difference. As a general rule, a union under Section 9 (a) of the National Labor Relations Act only becomes the representative of the employee collective agreement when the majority of workers support union representation. In other words, the workers decided whether they wanted to be represented by a certain union.

However, under Section 8 (f) of the NLRA, employers in the construction industry may decide to work in the construction sector without the workers supporting the majority. Indeed, employers in the construction industry do not need workers at all to sign an « 8 (f) agreement. As a result, these agreements became known as pre-lease leases.