Flood Design Below the BFE in Coastal A Zone

[structuralengr89]

For those of you familiar with coastal flood design, I have a small project where an Owner wants to build an attached garage to an existing home in Flood Zone AE. The existing home was built prior to the most recent FIRM and the FFE of the home is at 13' and the BFE is at 18'.

The building official wants an Engineer to sign off on this. If flood vents are used to help equalize the static flood loading in the garage, what flood loading do I need to check on the walls for Zone AE?

I have reviewed FEMA's Coastal Construction Manual which gives guidance for Flood loads in Velocity Zones for (Lateral Hydrostatic Loading, Buoyancy, Breakwave, Waveslam, Hydrodynamic Loading, Debris Impact, etc.)...but I haven't found any guidance for Design in AE Zones.

I would think that Flood Vents would eliminate hydrostatic loading, but the other loads would still apply?

Thanks for your help!