Section 151(10)(a) in The General Rules (Civil), 1957
(a)Where there are more than one proceedings relating to the adjustment or execution of the decree or order in a case, the entire record of each such subsequent proceeding, called a sub-part of Part 11, shall be treated as one paper, and as such shall be given a serial number in the general index of the first sub-part of part II, the entry being made in Form No. 1 as indicated on the next page-