The regulatory requirements and mitigation procedures for this species of bat is fairly new. There has not been enough successful cases in review to have a mitigation plan set in stone like many other endangered species. Enforcement has been implemented for small parcels such as a single family lot as well as parcels going through subdividing process. The review is usually triggered by an application to the Army Corp of Engineers which then notifies Fish and Wildlife Services. The site analysis requires expensive audio recordings over a period of time to see if the bat is present.
Hire a qualified environmental consultant before purchasing property if this layer is showing.
The final rule is available at: http://www.fws.gov/verobeach/NewsReleasesPDFs/20131002FloridabonnetedbatfinalruleFR.pdf