This notice clarifies how certain provisions of the Chemical 
Facility Anti-Terrorism Standards (CFATS) apply to the Chemical of 
Interest (COI) propane, which the Department of Homeland Security (DHS 
or Department) understands to contain at least 87.5% of the chemical 
propane. Specifically, this notice clarifies how the Screening 
Threshold Quantity and certain counting rule provisions apply to the 
COI propane.