Section 805(b) in Police Regulations, Bengal , 1943
(b)All Sub-Inspectors (except Sub-Inspectors of the Town Police and Special Armed Force) whose mother-tongue is not Bengali, will pass the following tests in Bengali :-(i)Making a translation in English of a Bengali paper read out to them.(ii)Reading out a Bengali paper and dictating orders in Bengali on such a paper.(iii)Translating into Bengali in writing an English report connected with a case.(iv)Conversing correctly and with facility in Bengali with two or three Bengalis on subjects with which they have official concern.