The bill amends section 373.423 of the Florida Statutes to enhance stormwater management systems by introducing new definitions and inspection requirements for municipal separate storm sewer systems (MS4) and their permittees (MS4 entities). It mandates that each MS4 entity conduct an operation and maintenance inspection of all permitted stormwater management systems by September 1, 2026. The inspection must identify any infrastructure that is significantly vulnerable to issues such as obstruction or failure, which could lead to flooding and property damage. Additionally, any identified infrastructure must be inspected annually thereafter.

Furthermore, the bill requires MS4 entities to complete a stormwater facility inspection checklist during each inspection, which must be submitted to the Department and the Division of Emergency Management by the specified date. The checklist should include details about the infrastructure identified during the inspections. The effective date for this act is set for July 1, 2025.