If any portion of any land within the boundary shown on any final map, parcel map, or record of survey map is subject to overflow, inundation, or flood hazard by stormwaters, such fact and such portion shall be clearly shown on the final map or parcel map. Such portion shall be enclosed in a separate border on each sheet of the map upon which such portion appears.
(Ord. 3157 § 1 (part), 1979)