Floodplain mapping.

Repeals the requirement that local floodplain administrators use the "best floodplain mapping data" as provided by the department of natural resources (department) and located on the Indiana Floodplain Information Portal when reviewing an application for a permit to authorize construction in or near a floodplain. Provides that, after June 30, 2023, a county or municipality may not issue a permit for construction activity in or near a floodplain unless the permit applicant is allowed to elect whether the local floodplain administrator will use: (1) the department's "best floodplain mapping data"; or (2) an engineering study provided by the permit applicant; in reviewing the permit application. Prohibits a local floodplain administrator from issuing a permit authorizing a structure or construction activity in or near a floodplain if the issuance of the permit will violate National Flood Insurance Program requirements. Provides that, after June 30, 2025, an individual may not serve as the floodplain administrator of a county or municipality unless the individual has successfully completed: (1) the Certified Floodplain Manager program of the Association of State Floodplain Managers; or (2) another course or training program for local floodplain managers that is approved by the Federal Emergency Management Agency or the department. Provides that a person that has: (1) an ownership interest; (2) a leasehold interest; or (3) a security interest; in a parcel of real property may at any time request a review by the department of the department's "best floodplain mapping data" that applies to the parcel of real property. Requires the department to conduct the review at no cost to the person requesting the review and to use a detailed hydrologic modeling method in conducting the review. Provides that: (1) if the person requesting the review has applied to a local floodplain administrator for a permit authorizing the construction of a structure or other construction activity on the parcel of real property; and (2) the department does not complete the review within 120 days after the review was requested; the person may elect whether the local floodplain administrator, in reviewing the person's permit application, will use the department's "best floodplain mapping data" or an engineering study provided by the person. Provides that, in the disclosure form that is adopted by the Indiana real estate commission and that must be submitted to a prospective buyer of real estate before the prospective buyer's offer is accepted, the owner of real estate must disclose the fact that all or a portion of the owner's real estate is located within a community's floodplain boundaries, as indicated in a Federal Emergency Management Agency Flood Insurance Rate Map, if the owner has personal knowledge of that fact.