Section 779(a) in Police Regulations, Bengal , 1943
(a)Constables are entitled to an increment of pay amounting to Re. 1 after three years' approved service, to a second increment of Re. 1 after seven years' approved service, to a third increment of Re. 1 after ten years' approved service, and a fourth increment of Re. 1 after seventeen years' approved service. There are no grades of constables and constables should not be described as belonging to any grade.
