Section 16(12)(d) in The Maharashtra Employees of Private Schools (Conditions of Service) Rules, 1981
(d)Half pay leave upto a maximum of 180 days shall be allowed to be commuted during the entire service where such leave is utilised for an approved course of study which is certified to be in the public interest by the authority sanctioning leave on the conditions mentioned in sub-clauses (i) and (ii) of clause (a).