The United States recognizes collective agreements   Collective agreements are signed for certain periods, usually two to four years. A collective agreement is mandatory for both the employers` organization and its members, the union and its members, on the other. In addition, a collective agreement is generally also in practice, if not theoretically, for individual non-unionized workers and unionized workers who belong to a union other than the union that are part of the collective agreement, provided that (i) the worker works with collective agreement tasks and (ii) that the union to which the worker is affiliated is not bound by another collective agreement with the employer. Although the collective agreement itself is not applicable, many of the negotiated terms relate to wages, conditions, leave, pensions, etc. These conditions are included in a worker`s employment contract (whether the worker is unionized or not); and the employment contract is of course applicable. If the new conditions are not acceptable to individuals, they may be contrary to their employer; but if the majority of workers have agreed, the company will be able to dismiss the complainants, usually unpunished. The right to collective bargaining is recognized by international human rights conventions. Article 23 of the Universal Declaration of Human Rights describes the ability to organize fundamental human rights unions.  Point 2 (a) of the International Labour Organization`s statement on fundamental principles and rights in the workplace defines “freedom of association and effective recognition of the right to collective bargaining” as an essential worker`s right.  The 1948 Convention on Freedom of Association and the Protection of the Right to Organization (C087) and several other conventions protect collective bargaining in particular by creating international labour standards that deter countries from violating workers` right to co-association and collective bargaining.  In the United States, the National Labor Relations Act (1935) covers most collective agreements in the private sector.