Primary use decides it. In FEMA’s examples, a nonprofit hospital’s medical office building leased 70 percent to for-profit doctors and labs is ineligible, because more than half the space serves an ineligible use. A hospital parking garage with 15 percent retail is eligible as a support facility, with funding prorated to the share used for hospital parking.
Floor plans with square footage by use and tenant (excluding common areas), leases, and documentation showing how a support facility serves the eligible primary facility.
A support facility is only eligible because of the critical facility it serves. The parking garage qualifies because of the hospital; the same garage owned by a nonprofit with only noncritical services would not.