R5P - An Ordinance Of The Mayor And City Commission Of The City Of Miami Beach, Florida, Amending Chapter 54 Of The Miami Beach City Code, Entitled "floods," By Amending Article I, Entitled "in General," And Article Ii, Entitled "floodplain Management," Division 1, Entitled "generally," Division 2, Entitled "general Provisions," Division 3, Entitled "administration," Division 4, Entitled "provisions For Flood Hazard Reduction," Division 5, "variance Procedures," And Article Iv, Entitled "stormwater Management Requirements," In Order To Conform Existing Provisions With The Requirements Of The National Flood Insurance Program, Managed By The Federal Emergency Management Agency, And The Florida Building Code, Including By Adopting The Following Amendments: 1) Apply The Standards For Coastal High Hazard Areas To Coastal A Zones; 2) Modify The Definition Of Substantial Improvement To Include Substantial Structural Alterations And Work Determined To Be A Level 3 Alteration Under The Florida Building Code, And Modify Other Related Definitions; And 3) Adopt Requirements For Certain Improvements That Are Not Substantial Improvements, And For Buildings And Structures In Flood Areas; And By Adopting Other Related Amendments; And Providing For Repealer, Severability, Codification, And An Effective Date.