Section 835(b) in Police Regulations, Bengal , 1943
(b)The number of transfers should be reduced to a minimum. The exigencies of sickness, leave, promotion, retirements, serious misconduct and other unpreventable causes make a certain number of changes unavoidable. All the more therefore is it incumbent on Superintendents and Deputy Inspectors-General to abstain from making transfer, particularly transfers of officers-in-charge of investigating centres, when such transfers can be avoided. (See regulation 877)