The Enterprise Agreement (AE) is an instrument that regulates the labor relations between the company and the workers, in order to assure the rights, the duties and the obligations between the parties.
The EA is an instrument subscribed between the company and the trade unions, representing the workers, and their conclusion depends on the agreement of the parties who, in the context of the contract negotiations, are on a parity plan.
In addition to the EA, as a regulator of labor relations, one can not fail to observe the General Labor Law, which also regulates the rights, duties and obligations between the parties, in its general scope for all sectors of work.
See here the AE, published in Bulletin of Labor and Employment, no. 1, of January 8, 1997, applied to all workers, except for changes in the scope of the General Labor Law.