Section 741(6)(h) in Police Regulations, Bengal , 1943
(h)On permanent vacancies becoming available in the Range, Range Deputy Inspector-General in a Board with all Superintendents of Police of the Range will scrutinise the records of the officiating Sub-Inspectors who have successfully undergone the training course in the Police Training College and declare fitness for confirmation of the incumbents in order of seniority of the names in the Approved List of the Range mentioned in clause (f) above.(F)Permanent promotion to the rank of Sub-Inspector of those Assistant Sub-Inspectors who are already officiating as Sub-Inspectors before the above rules come into force shall be in accordance with the procedure as below :-