If your employment contract stipulates that it is subject to the collective agreement, this means that all contractual changes agreed between the employer and the union in accordance with the provisions of the collective agreement would be automatically incorporated into the terms of your employment contract. A collective agreement is an agreement between an employer and a union. This allows an employer to agree with the union on terms and conditions of employment (and possibly other matters) concerning the workers covered by the agreement. The general situation is that, where a provision of a collective agreement is included in an individual contract of employment, that provision, as the duration of this contract, has a separate contractual effect which the employee may rely on. . . .