CBA a contract between labor org, employer re: employment terms

A Collective Bargaining Agreement refers to the negotiated contract between a legitimate labor organization and the employer concerning wages, hours of work and all other terms and conditions of employment in a bargaining unit, including mandatory provisions for grievances and arbitration machineries. As in all other contracts, the parties in a CBA may establish such stipulations, clauses, terms and conditions as they may deem convenient provided they are not contrary to law, morals, good customs, public order or public policy. [G.R. No. 117878. November 13, 1996]