Maryland Tax - General Section 9-315
§ 9-315.
  (a)   A licensed dealer or licensed special fuel seller shall deduct 0.5% of the 1st 10 cents of the motor fuel tax on each gallon of motor fuel, as a discount:
    (1)   instead of an allowance for evaporation, shrinkage, and handling; and
    (2)   to reimburse the licensed dealer or licensed special fuel seller for expenses incurred for the State in:
      (i)   keeping records;
      (ii)   collecting and paying the tax; and
      (iii)   preparing reports.
  (b)   (1)   This subsection does not apply to:
      (i)   any aviation gasoline; or
      (ii)   any other motor fuel on which the motor fuel tax has not been paid.
    (2)   From the discount under subsection (a) of this section:
      (i)   a licensed dealer who sells gasoline to a retail service station dealer shall deduct on the bill 1/2 of the discount;
      (ii)   a licensed dealer who sells gasoline to a licensed distributor or licensed special fuel seller shall deduct on the bill 2/3 of the discount;
      (iii)   a licensed distributor who sells motor fuel to a retail service station dealer shall deduct on the bill 1/3 of the discount;
      (iv)   a licensed special fuel seller who sells special fuel to a retail service station dealer shall deduct on the bill 1/2 of the discount;
      (v)   a licensed special fuel seller who sells special fuel to a licensed distributor shall deduct on the bill 2/3 of the discount; and
      (vi)   a licensed special fuel seller who sells gasoline to a licensed distributor shall deduct on the bill 1/3 of the discount.