Md. Code, Natural Resources § 8–1309

The appropriate county governing body or its duly designated agency may acquire lands for the purposes stated in this subtitle outside of the area of the Watershed plan, if the appropriate county governing body or its duly designated agency finds that acquisition is necessary to preserve any portion of the Watershed plan in its county. The appropriate county governing body or its duly designated agency may expend any authorized funds under the provisions of this subtitle to purchase land outside the area of the Watershed plan.