The Leave Policy of an industrial organization should basically conform to the types and scale of leave as provided for in the establishment-specific Labor Law applicable to the establishment. Other aspects like sanction, clubbing of holidays with leave as prefix and suffix, sandwich rule, restrictions on the number of leave that can be taken at a stretch, etc., can be set down in the Leave Policy considering the nature of jobs of the employees.
Your inability to comply with the leave provisions of any law applicable, as reflected in your leave policy, cannot be a valid excuse for non-compliance with the concerned legal provisions.