Md. Code, Land Use § 24–306

(a) Except as otherwise provided in the agreement under § 24–305(a)(3) of this subtitle or extended by amendment under subsection (b) of this section and § 24–308 of this subtitle, an agreement is void 5 years after execution by the parties.

(b) If approved by the district council or County Executive, as appropriate, the term of an agreement may be extended.