FEMA's Public Assistance Grant Program: Background and Considerations for Congress [April 16, 2015] [open pdf - 725KB]
"The Public Assistance Grant Program (PA Program) is administered by the Federal Emergency Management Agency (FEMA) and combines the authorities of multiple sections of the Robert T. Stafford Disaster Relief and Emergency Assistance Act (P.L. 93-288, as amended, the Stafford Act). The PA Program is only available for states and communities that have received a major or emergency disaster declaration through the Stafford Act (and in a more limited fashion, Fire Management Assistance Grants)."
CRS Report for Congress, R43990