14 CFR §254.6

The Department of Transportation will review the domestic baggage liability limit prescribed in this part every two years. The Department will use the Consumer Price Index for All Urban Consumers as of July of each review year to calculate the revised domestic baggage liability limit amount. The Department will use the following formula: $2500 × (a/b) rounded to the nearest $100, where a = July CPI-U of year of current adjustment and b = the CPI-U figure in December 1999 when the inflation adjustment provision was added to this part.