Section 45 of Chhattisgarh Civil Services Rule

45. Accounting of study leave and combination with leave of other kinds.- (1) Study leave shall not be debited against the leave salary of Government servant. (2) Study leave may be combined with other kinds of leave, but in no case shall the grant of this leave in combination with leave other than extra-ordinary leave involve a total absence of more than twenty eight months generally and thirty-six month for the course leading to Ph.D. degree or a post graduate degree of more than twenty eight months duration from the regular duties of the Government servant. (3) A Government servant granted study leave in combination with any other kind of leave may, if he so desires undertake or commence his study before the end of the other kind of leave but the period of such leave coinciding with the course of study shall not count as study leave.