From the Overview: "The Flood Risk Map (FRM) provides a geographic overview and representation of flood risks within the project area. The FRM is not a regulatory product and is an optional product to produce for a flood risk project. The FRM is also typically created along with the Flood Risk Report (FRR) and the Flood Risk Database (FRD), although only the FRD is required of these three products."
Guidance Document 9
U.S. Federal Emergency Management Agency: https://www.fema.gov/