Labor Relations Board v. Sociedad Mario Mercado e Hijos

This is a petition to enforce an arbitration award in a labor dispute. It was filed in this Court by the Labor Relations Board of Puerto Rico in the name of the Unión de Trabajadores de Factoría, Núm. 35 de Guayanilla, Puerto Rico against the employer, Sociedad Mario Mercado e Hijos, which operates a sugar mill known as Central Rufina. The employer filed an answer raising certain questions of law and fact, and we held a hearing at which testimony was introduced by both parties.

On April 21, 1951 the union and the employer signed a collective bargaining agreement, retroactive to January 1,…