In this subtitle the following words have the meanings indicated. “Commissioners” means the Board of County Commissioners of Allegany County, Garrett County, or Washington County, respectively. “Council” means the Tri–County Council for Western Maryland. “Executive Director” means the Executive Director of the Council. “Member county” means each county in the region that pays annual dues that the Council sets. “Plan” means a regional plan that the Council prepares for the region. “Region” means Allegany, Garrett, and Washington counties.