Maryland Code, Land Use § 21-103

(1) a general plan for the development of that portion of the regional district located in each county; and

(2) amendments to the general plan.

(c)(1) In accordance with Subtitle 2 of this title, the Commission may initiate and adopt any amendment to the general plan.

(2) The appropriate district council may designate a functional master plan, an area master plan, or an amendment to either plan, as an amendment to the general plan.