Md. Code, Nat. Res. § 8-1311

(a) The appropriate county governing body or its duly designated agency may: (1) Lease for a term not exceeding 20 years and renew any lease for any additional term, not exceeding 20 years each, to any person, any portion of the land acquired for the purposes stated in this subtitle; and (2) Grant any privilege, permit, or enter into any contract with any person, to engage in any business or enterprise on land acquired for the purposes stated in this subtitle on terms and conditions the appropriate county governing body or its duly designated agency deems advantageous to develop the Watershed plan. (b) The purpose for which any property is leased, and any privilege, permit, and concession is granted, may not be inconsistent with the use of the property as recommended by the Watershed plan. Any lease or contract executed under the provisions of this section shall contain a condition stating specifically the purpose for which the property is leased or the privilege, permit, or concession is granted. Any lease, contract, privilege, or permit requires approval of the Department.