Kuwait Court of Cassation principle number 1049

A grant given by an employer to his workers in addition to their agreed wages passing from the realm of donation into that of obligation. Its condition. The employer's habitual granting of it and the worker's belief that the employer is obliged to provide it. Habitual practice. Its conditions. Generality, continuity, and constancy of value. Establishment of the worker's entitlement to the grant. Its effect. - Assessing the existence of custom. Within the authority of the court of merits, provided that it bases its judgment on sound reasons.