Pub. L. 109-59, tit. IV, subtit. A, sec. 4138
HIGH RISK CARRIER COMPLIANCE REVIEWS.
SEC. 4138. HIGH RISK CARRIER COMPLIANCE REVIEWS. From the funds authorized by section 31104(i) of title 49, United States Code, the Secretary shall ensure that compliance reviews are completed on motor carriers that have demonstrated through performance data that they pose the highest safety risk. At a minimum, a compliance review shall be conducted whenever a motor carrier is rated as category A or B for 2 consecutive months.