Md. Code, Bus. Reg. § 17-1005

(a) (1) Except as otherwise provided in this subtitle, a person must have a junk dealer or scrap metal processor license whenever the person does business as a junk dealer or scrap metal processor in the State. (2) This subsection does not apply to a situation in which: (i) a nonresident junk dealer or nonresident scrap metal processor buys junk or scrap metal from a junk dealer or scrap metal processor licensee who is a resident of the State; or (ii) the nonresident junk dealer or nonresident scrap metal processor transports that junk or scrap metal. (3) If a nonresident junk dealer or nonresident scrap metal processor comes into the State in a vehicle, the nonresident junk dealer or nonresident scrap metal processor may not transport from the State in that vehicle any junk or scrap metal bought in the State unless the nonresident junk dealer or nonresident scrap metal processor holds a junk dealer or scrap metal processor license. (b) (1) Except as otherwise provided in this subtitle, a person must have an agent license whenever the person acts as an agent in the State. (2) This subsection does not apply to a salaried employee of a junk dealer or scrap metal processor licensee.