Maryland Transportation Section 13-927
§ 13-927.
  (a)   (1)   When registered with the Administration, every trailer and semitrailer is a Class G (trailer) vehicle.
    (2)   A Class G (trailer) vehicle shall be classified as "freight" or "nonfreight".
  (b)   A nonfreight trailer or semitrailer is a vehicle designed for towing by a Class A (passenger) vehicle, a Class M (multipurpose) vehicle, or a Class E (truck) vehicle, and shall:
    (1)   (i)   If towed by a Class E (truck) vehicle, have a gross weight of 20,000 pounds or less; or
      (ii)   If towed by a Class A (passenger) vehicle or a Class M (multipurpose) vehicle, have a gross weight of 10,000 pounds or less; and
    (2)   Be a:
      (i)   Boat trailer;
      (ii)   Camping trailer;
      (iii)   Travel trailer;
      (iv)   House trailer; or
      (v)   Utility trailer.
  (c)   A freight trailer or semitrailer shall be:
    (1)   Designed for towing by a Class E (truck) or Class F (tractor) vehicle; and
    (2)   (i)   In excess of 20,000 pounds gross weight if towed by a Class E (truck) vehicle; or
      (ii)   In excess of 10,000 pounds gross weight if towed by a Class F (tractor) vehicle.
  (d)   The annual registration fee for a Class G (trailer) vehicle is based on the maximum gross weight as follows:
    (1)   Except as provided in paragraph (2) of this subsection, for a nonfreight trailer or semitrailer:
Maximum Gross Weight     Fee
Limit (in Pounds)    
3,000 or less     $25.50
3,001 to 5,000     51.00
5,001 to 10,000     80.00
10,001 to 20,000     124.00
    (2)   For a nonfreight trailer or semitrailer with a maximum gross weight limit (in pounds) of 10,001 to 20,000 that is titled on or after October 1, 2005:
      (i)   The fee is $124.00; and
      (ii)   The vehicle shall be registered in one of the following weight ranges:
Maximum Gross Weight    
Limit (in Pounds)
10,001 to 11,000    
11,001 to 12,000    
12,001 to 13,000    
13,001 to 14,000    
14,001 to 15,000    
15,001 to 16,000    
16,001 to 17,000    
17,001 to 18,000    
18,001 to 19,000    
19,001 to 20,000    
    (3)   For a freight trailer or semitrailer the fee is $38.25.