(1) For determination of the limits of a flood basin, the prescribed authority shall cause a survey to be made of a water source and for the said purpose proper charts and registers shall be prepared specifying all the boundaries and landmarks and any other necessary matter for the purposes of ascertaining such limits.
(2) The prescribed authority may outsource the work of survey and investigation to, or seek the technical expertise from, the Central Water Commission for the purposes of making a survey of the area as required under sub-section (1).
(3) On the basis of such survey and investigation, the prescribed authority shall delineate the areas which are subject to flooding including classification of land and shall prepare charts and registers indicating the areas delineated.