Md. Code, Courts and Judicial Proceedings § 6–103.2

A court may exercise personal jurisdiction over a nonresident defendant alleged to be the father in a paternity proceeding if:

(1) The mother resides in this State at the time the suit is filed;

(2) The nonresident alleged father personally has been served with process in accordance with the Maryland Rules; and

(3) The act of conception is alleged to have occurred in this State.