In this part, 'prior established municipal corporation': (1) means a municipal corporation subject to Article XI–E of the Maryland Constitution that includes land added to the regional district under Chapter 596 of the Acts of the General Assembly of 1957; and (2) includes: (i) Barnesville; (ii) Brookeville; (iii) Gaithersburg; (iv) Laytonsville; (v) Rockville; (vi) Poolesville; and (vii) Washington Grove.
Maryland Legal Code