Section 874(ii) in Police Regulations, Bengal , 1943
(ii)Black marks may be awarded in lieu of the other punishments enumerated in regulation 857 to Inspectors, Sergeants, Sub-Inspectors, Assistant Sub-Inspectors, head constables and naiks. They are intended to take the place of fines which shall not be inflicted. Not more than one black mark shall be awarded for any one specific offence, nor shall a black mark be awarded in addition to any other punishment.