In this part, “prior established municipal corporation”: 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 includes: Barnesville; Brookeville; Gaithersburg; Laytonsville; Rockville; Poolesville; and Washington Grove.

This part applies only in Montgomery County.

Except as provided by agreement under § 20–704 of this subtitle, the Commission, county planning board, and district council may not exercise any planning or zoning power in any prior established municipal corporation in the county. Except as otherwise provided in this part: the county may not impose the administrative tax provided for under § 18–307 of this article in a prior established municipal corporation; any local law adopted by the Commission, county planning board, or district council does not apply to a prior established municipal corporation; and §§ 20–401 and 20–502 through 20–504 of this title and Title 22, Subtitle 1 and §§ 22–308, 23–102, 23–103, 23–301, and 23–302 of this article do not apply to a prior established municipal corporation.

The Commission or the county planning board may enter into an agreement with a prior established municipal corporation that allows the Commission or the county planning board to exercise planning and zoning powers in the municipal corporation. On execution of an agreement authorized under this section, the following shall apply to a prior established municipal corporation that enters an agreement with the Commission or the county planning board: all local laws and official acts of the Commission or the county planning board and the district council that are in effect in the regional district within the county; all provisions of this title; and the administrative tax provided for in § 18–307 of this article. An agreement under this section may authorize the governing body of the prior established municipal corporation to act as the district council for the municipal corporation. If the governing body of the municipal corporation is authorized to act as the district council for the municipal corporation, the governing body shall exercise all the power granted to the district council by this title within the municipal corporation. An agreement under this section between a municipal corporation and the Commission or county planning board shall remain in effect as written unless revoked or amended by mutual action of the parties to the agreement.

The Commission or the county planning board may submit recommendations to any prior established municipal corporation regarding any planning or zoning action under consideration by the municipal corporation. The prior established municipal corporation shall incorporate the recommendation of the Commission or the county planning board as a part of the record of the planning or zoning action.

A municipal corporation in the regional district that is not a prior established municipal corporation in the county may not exercise any planning, zoning, or subdivision power unless expressly authorized in this division.

A municipal corporation in Prince George’s County that is in the regional district may not exercise any powers relating to planning, subdivision control, or zoning not granted to the municipal corporation by the district council under § 25–303 of this article.