Section 4(1)(A) in The Indian Police Service (Pay) Rules, 2007
(A)in the cases of all members of the Service,-(i)an amount representing forty per cent of the basic pay in the existing scale shall be added to the existing emoluments' of the member of the Service;(ii)after the existing emoluments have been so increased, the pay shall thereafter be fixed in the revised scale at the stage next above the amount computed: