Maryland Natural Resources Section 5-420

      The Department shall prepare and conduct examinations as often as necessary, but at least once a year if there are any applicants. A candidate who has passed the examination in all but one of the subjects given may be reexamined in that subject only at any subsequent examination held, and if the candidate passes that subject the candidate is considered to have passed the examination. The Department, however, may decide to reexamine an unsuccessful candidate in every subject.