After the final plat has been approved by the Planning Commission and Council and the necessary approvals endorsed in writing thereon, together with evidence of title, the subdivider shall cause the final plan as approved by the Commission and Council to be recorded in the office of the County Recorder no later than thirty days after the date of approval unless an extension is agreed to by Council. The subdivider shall furnish Council with a reproducible copy of the recorded plan on permanent reproducible material. Failure to record on time may cause the final plan to be declared null and void by Council.