The fees were adjusted in response to public comments FMCSA received after the issuance of the NPRM. The adjustment was made primarily from a change in the bracket shift factor. In the NPRM, FMCSA considered a bracket shift factor of 25% to account for departures from the expected number of CMVs used to determine the applicable fees.
The final rule used a 15% bracket shift factor. The result is a downward adjustment in fees proposed in the NPRM, although the fees increased in each fee bracket (compared to the previous fees) in order to obtain full funding for the participating states.