Section 21(3) in The Maharashtra Employees of Private Schools (Conditions of Service) Rules, 1981
(3)For schools having more than 20 classes, the Head, the Assistant Head and the Supervisor shall do teaching work for at least, 4, 8 and 10 hours per week respectively. For schools having 20 or less classes the Head and the Supervisor shall do teaching work for at least 6 and 12 hours per week, respectively.
