Geographical codes may be specified to the user's desired level of detail using the GEOCODE_LEVEL[1-4] files. GEOCODE_LEVEL1 contains three character codes for each country in the inventory (CCC). GEOCODE_LEVEL2 contains six character codes for each state that the user would like to track in the inventory (CCCSSS). GEOCODE_LEVEL3 contains nine character codes for each county that the user would like to track in the inventory (CCCSSSYYY). GEOCODE_LEVEL4 contains twelve character codes for each tribal region that the user would like to track in the inventory (CCCSSSYYYTTT).