Section 383.135 - Passing knowledge and skills tests(a)Knowledge tests.(1) To achieve a passing score on each of the knowledge tests, a driver applicant must correctly answer at least 80 percent of the questions.(2) If a driver applicant who fails the air brake portion of the knowledge test (scores less than 80 percent correct) is issued a CLP or CDL, an air brake restriction must be indicated on the CLP or CDL as required in § 383.95(a) .(3) A driver applicant who fails the combination vehicle portion of the knowledge test (scores less than 80 percent correct) must not be issued a Group A CLP or CDL.(b)Skills Tests.(1) To achieve a passing score on each segment of the skills test, the driver applicant must demonstrate that he/she can successfully perform all of the skills listed in § 383.113 and attain the scores listed in Appendix A of the examiner manual referred to in § 383.131(b) for the type of vehicle being used in the test.(2) A driver applicant who does not obey traffic laws, causes an accident during the test, or commits any other offense listed as a reason for automatic failure in the standards contained in the driver and examiner manuals referred to in §§ 383.131(a) and (b) , must automatically fail the test.(3) If a driver applicant who performs the skills test in a vehicle not equipped with any type of air brake system is issued a CDL, an air brake restriction must be indicated on the license as required in § 383.95(a) .(4) If a driver applicant who performs the skills test in a vehicle equipped with air over hydraulic brakes is issued a CDL, a full air brake restriction must be indicated on the license as required in § 383.95(b) .(5) If a driver applicant who performs the skills test in a vehicle equipped with an automatic transmission is issued a CDL, a manual transmission restriction must be indicated on the license as required in § 383.95(c) .(6) If a driver applicant who performs the skills test in a combination vehicle requiring a Group A CDL equipped with any non-fifth wheel connection is issued a CDL, a tractor-trailer restriction must be indicated on the license as required in § 383.95(d) .(7) If a driver applicant wants to remove any of the restrictions in paragraphs (b)(3) through (5) of this section, the applicant does not have to retake the complete skills test. The State may administer a modified skills test that demonstrates that the applicant can safely and effectively operate the vehicle's full air brakes, air over hydraulic brakes, and/or manual transmission. In addition, to remove the air brake or full air brake restriction, the applicant must successfully perform the air brake pre-trip inspection and pass the air brake knowledge test.(8) If a driver applicant wants to remove the tractor-trailer restriction in paragraph (b)(6) of this section, the applicant must retake all three skills tests in a representative tractor-trailer.(c)State recordkeeping. States must record and retain the knowledge and skills test scores of tests taken by driver applicants. The test scores must either be made part of the driver history record or be linked to the driver history record in a separate file. 76 FR 26892 , May 9, 2011