Maryland Code, TRANSPORTATION 16-817
(1) Who is not a resident of Maryland; and
(2) Who is not at least 21 years of age.
(b) The Administration may issue a Class A, B, or C commercial driver’s license or a commercial driver’s instructional permit to an individual under the age of 21, if the individual is at least 18 years of age. The license:
(1) May not include a hazardous materials endorsement;
(2) May not be valid for commercial interstate operation except as permitted by 49 C.F.R. Parts 390 to 399; and
(3) Shall be valid for commercial intrastate and all noncommercial operation.
(c) Consistent with the Code of Federal Regulations, the Administration may issue a commercial driver’s license to an applicant domiciled in a foreign country.