The right to bargain collectively with an employer enhances the human dignity, freedom and autonomy of workers by giving them the opportunity to influence the definition of employment rules and thus gain some control over an important aspect of their lives, namely their work. Collective bargaining is not only an instrument for achieving external objectives. on the contrary, [it] is valuable as experience in self-management per se. Collective bargaining enables workers to achieve a form of democracy for employment and to guarantee the rule of law in the workplace. Workers get a voice to influence the definition of rules that control an important aspect of their lives.  As soon as the parties are at an impasse, the employer may make unilateral changes to mandatory bargaining matters, provided that the employer has previously proposed these changes to the union (NLRB v. These conditions are included in an employee`s employment contract (whether or not the worker is a member of the union); and the employment contract is of course applicable. If the new conditions are not acceptable to individuals, they may contradict their employer; but if the majority of workers have agreed, the company will be able to dismiss the plaintiffs, normally with impunity. Some collective agreements deal with the general relationship between an employer or employers` organisation and trade unions. These agreements generally regulate issues such as participation, negotiated procedures and the definition of common objectives with regard to the future development of the labour market and employers. As a rule, agreements with the above-mentioned topics are concluded between the federal employers` organizations and their national central counterparts.