(1) In each district the Superintendent of Police shall issue standing orders regulating the point and beat duty to be carried out in each town and cantonment for which police establishment is provided. These orders shall be in accordance with the principles set forth in rule 2.2(2) and shall be revised as often as may be necessary to meet variations in the local incidence of crime, development of new residential or commercial areas, increase in establishment and the like. The division between the investigation and clerical staff and the watch and ward staff shall be maintained as far as is practicable, though interchange of duties should be made. Men, even though qualified, should not be employed on the investigation staff while posted to the watch and ward staff, except in cases of emergency, as such employment must detract from the efficiency of the watch and ward system. (2) The success of a system of watch and ward in a town or city will depend on - (a) the discipline of the men on beat the patrol duties; (b) the extent to which the men have been instructed in their duties; (c) the amount of supervision exercised by supervisor officers. Superintendents of Police must therefore arrange that, in addition to the standing orders referred to in the above rule, head constables and constables are frequently questioned so as to ensure that the training they have received in the lines school and at the Police Training School is not forgotten but put into practice. Each constable on beat or patrol duty should continually have in mind the specific duties required of him.