13 CFR 120.934: Collateral.

The CDC usually takes a second lien position on the Project Property to secure the 504 loan. Sometimes additional collateral is required. (In rare circumstances, SBA may permit other collateral substituted for Project Property.) All collateral must be insured against such hazards and risks as SBA may require, with provisions for notice to SBA and the CDC in the event of impending lapse of coverage.