Maryland Code, Natural Resources § 10-502

(a) Any nonresident of the State who desires to trap furbearers, except otter or beaver, first shall procure a nonresident trapper's license in addition to any other license required. The license shall be issued only to residents of other states which grant the same trapping privileges to Maryland residents.

(b) The license shall be:

(c) In addition to the license fee, the designated person who sells and issues the license may collect a processing fee equal to 10% of the license fee, and the balance of the fee shall be paid and accounted for in the manner provided by § 10-209 of this title.