Section 91 in The Border Security Force (Ceremonials And Marks Of Respect) Rules, 1989
91. Posting of the sentry at the Border out post first sentry
.-(a) After completing all formalities at reveille, the Commander of the right Guard will command "First Detail Fall in ".(b)On this word of command the first sentries of both the countries will march smartly and halt at boundary line keeping 24 inches shoulder distance between each other.
