Section 9(9)(b) in The Maharashtra Employees of Private Schools (Conditions of Service) Rules, 1981
(b)In the case of a non-teaching post, if a person from the particular category of Backward Classes is not available, the Management shall make efforts with regular intervals to fill up the post within the period of five years and the post shall not be filled up during that period by appointing any other person who does not belong to the respective category of Backward Class.