Maryland Code, Corporations and Associations § 5-335

(a) This part does not affect the geographical boundaries of any parish, as distinguished from a separate congregation without prescribed geographical boundaries, in the Diocese of Maryland on July 1, 1973.

(b) A parish may not be subdivided into a new parish or added in whole or in part to any existing parish unless approved by a majority vote of the vestry of each parish affected by the subdivision or addition.