(14)When a Principal or Headmaster leaves his headquarters during the vacation some other member of the teaching staff must be detained on duty. The Principal or Headmaster may not leave his headquarters till he receives the orders of the authority competent to permit him to leave his station as to the arrangements to be made for the charge of the college or school during his absence. He should submit proposals to this authority at least three weeks before the commencement of each vacation.(D. P. I.'s circular no. 10, dated the 4th February 1915.)Notes. - (1) Officers submitting proposals with respect to the charge of Government professional colleges and schools during vacations should bear in mind the ne d for economy. Officers in the Bihar Educational Service, Class I will not be detained on duty during vacations unless it is satisfactorily shown, at least three weeks before the vacation commences, that suitable arrangements cannot be made at a small cost.