Section 9(2) in The U.P. Area Development (Regulation of Water Supply) (Osrabandi) Rules, 1979
(2)For sequencing the releases of water the Thoks shall be numbered in the following manner:(i)Thok No. I shall be that which has a field nearest to the head of the main 'Gul' and on its left side (if there is any chak road adjoining the main gul, the chak road and the gul combined shall be considered to be the main gul).(ii)Thok No. II shall be that which has a field nearest to the head of the main gul and on its right side .(iii)Thok No. III shall be that which has a field nearest to the head of the main gul, on its left side, and after Thok No. 1.(iv)Similarly Thok Nos. IV, V, etc. shall be determined.(v)When the numbering of Thoks on the main gul has been completed, the Thoks on the nearest branch gul shall be similarly numbered.(vi)Similarly the all the branch guls shall be numbered, gradually moving away from the head of the main gul.(vii)In case two branch guls take off at the same point from the main gul, the one on the left of the main gul shall be considered first.
