§ 219-c. Operating authority. As used in this article, the term "metropolitan transportation authority" shall mean the authority and its subsidiaries, the Long Island railroad, metro-north railroad, metropolitan suburban bus authority and Staten Island rapid transit operating authority, of the Triborough bridge and tunnel authority, and of the New York city transit authority and its subsidiary, the Manhattan and Bronx surface transit operating authority, or any other agency that may come under the control of the authority, or within their custody or control.