Section 1077(b) in Police Regulations, Bengal , 1943
(b)All copying work will be attended to without delay, and special care will be taken to see that letters are signed and issued in time to catch the different mails. The ordinary rule is that letters, the drafts of which have been passed before midday, will issue on the same day, and those of which the drafts have been passed after midday, before noon of the succeeding day.