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Guide For Approximate Zone A Areas Floodplain Management I I I ~ t I at its discretion, require the use of detailed methods for such development. While this requirement is more restrictive than NFIP minimum requirements, the NFIP regulations specifically recognize and encourage states and communities to adopt and enforce more restrictive floodplain management regulations in those instances where the state or community believes that it is in the best interest of its citizens. No matter what the size of the subdivision or other development proposal, requests to revise or amend effective Flood Insurance study information through the procedures outlined in Part 65 and Part 70 of the NFIP regulations must be based on detailed methodologies presented in section V or other methodologies comparable to those found in a Flood Insurance Study. The analysis used to develop the BFEs must be certified by a registered professional engineer or licensed land surveyor, as appropriate, if the BFEs are to be used to revise or amend an NFIP map. Use of Draft or Preliminary Flood Insurance studY Data I , I I . r The data from a draft or preliminary flood insurance study constitutes "available data" under Subparagraph 60.3 (b) (4). Communities must reasonably utilize the draft or preliminary flood insurance study data under the section of their ordinance that requires the use of other base flood data when detailed BFE data has not been published in a flood insurance study. Communities are given discretion in using draft or preliminary flood insurance study data only to the extent that the technical or scientific validity of the proposed flood elevation data is questioned. If a community decides not to use the draft or preliminary flood insurance data in a FIS because it is questioning the data through a valid appeal, the community must still assure that buildings are constructed using methods and practices that minimize flood damages in accordance with the requirements under Subparagraphs 6D.3{a) (3) and (4). When all appeals have been resolved and a notice of final flood elevations has been provided by FEMA, communities are required to use the data from the flood insurance study for regulating floodplain development in accordance with Subparagraph 60.3 (b){ 4) since the data represents the best data available. Communities must regulate floodplain development using the flood insurance study data under Subparagraph 60.3{b){4) until such time as the community has adopted the effective FIRM and flood insurance study. III-7