The Corporation shall maintain: its principal office in the State; and a designated agent to accept service of process. The Corporation shall file the name and address of the designated agent with the State Department of Assessments and Taxation. The Corporation is exempt from any special tax, property tax, recordation tax, or transfer tax imposed by the State or a political subdivision of the State. Except as otherwise provided in this title, the Corporation is not a unit or instrumentality of the State.