Article 123 of the Constitution of 1917, fraction XX: “Las diferencias o los conflictos entre el capital y el trabajo se sujetarán a la decisión de una Junta de Conciliación y Arbitraje” (Differences or conflicts between capital and labor shall be submitted to the decision of a Conciliation and Arbitration Board). The board was formed by an equal number of representatives of workers and of employers, and one of the government.
Workers and employers have the same number of seats. The one remaining seat belongs to the government.