(4)The canal officer or any other officer authorised for execution for the purpose of this section shall during the period between 15th September and 1st October every year, in the presence of the permanent holders and occupiers or their representatives-in-interest mark out the land actually submerged under water of the submerging tank in the village map by a contour line and obtain signatures on the map of the permanent holders and occupiers or their representatives-in-interest present on the spot.