(a) There shall be charged a fee of sixty dollars for each renewal of a commercial driver’s license.

      (b) There shall be charged for each commercial driver’s license knowledge test a fee of sixteen dollars. There shall be charged for each commercial driver’s license skills test a fee of thirty dollars. There shall be charged for each commercial driver’s license learner’s permit a fee of ten dollars.

      (c) There shall be charged, in addition to the fee provided in subsection (b) of this section for the commercial driver’s license knowledge test, a fee of five dollars for each test for an endorsement to a commercial driver’s license. There shall be charged, in addition to the fee provided in subsection (b) for such knowledge test, a fee of five dollars for each test for the removal of a restriction to a commercial driver’s license relating to air brakes. There shall be charged, in addition to the fee provided in subsection (b) for such knowledge test, a fee of five dollars for each combination vehicle knowledge test.