Maryland Criminal Procedure Section 7-201

      (a)      Subject to subsection (b) of this section, in a case in which a sentence of death has been imposed, the circuit court may not exercise jurisdiction over a proceeding under this title unless the petition is filed within 210 days after:

            (1)      the Supreme Court of the United States passes an order denying a petition for a writ of certiorari;

            (2)      the Supreme Court of the United States makes a decision affirming the sentence of death; or

            (3)      if no review is sought, the time for seeking review by the Supreme Court of the United States expires.

      (b)      The circuit court may extend the period within which the petition shall be filed if good cause for the extension is shown.