Article 36 of the Maryland constitution declares that it is the duty of every man to worship God and that anyone who does not believe in the existence of God can ipso-facto be declared incompetent to serve as a juror or be a witness. Article 37 then declares that anyone who refuses to publicly declare a belief in the existence of God can be denied any office of profit or trust in this state. In 1961 the SCOTUS declared Article 37 a violation of the 1st and 14th amendments. Maryland has taken no action since then to correct Article 37 (to the best of my knowledge). Instead, a constitutional amendment modifying Article 36 was passed in 1970 to allow "the making reference to belief in, reliance upon, or invoking the aid of a God or Supreme Being" in "any government or public document, proceeding, activity, ceremony, institution, school, or place".
Here are copies of draft amendments to Articles 36 & 37 that I wrote: http://www.scribd.com/mobile/doc/142450752 and
http://www.scribd.com/mobile/doc/142450751. We need to try to find a sponsor in both the Senate and the House to bring such amendments to a vote. The Senate Judicial Proceedings Committee is responsible for reviewing constitutional amendments.