Md. Code, Land Use § 20–701

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.