Lands acquired under this article, title to which shall become vested in the State of Maryland or the Maryland-National Capital Park and Planning Commission, shall be held by the State or the Commission for the general benefit of the citizens of the State of Maryland and especially for the benefit of the citizens and residents of Montgomery and Prince George's counties within the metropolitan district. Title to the lands may not be conveyed by the State, nor may such use be extinguished without the approval by resolution of the Commission.