6. Public works, included under the following heads, namely:
(a) Construction and maintenance of Provincial buildings used or intended for any purpose in connection with the administration of the Province, and care of historical monuments into the exception of ancient monuments as defined in Section 2 (1) of the Ancient Monuments’ Preservation Act, 1904, which are for the time being declared to be protected monuments under Section 3 (1) of that Act : provided that the Viceroy, acting on the advice of the Cabinet, may, by notification in The Gazette of India, remove any such monument from the operation of the exception;
(b) roads, bridges, ferries, tunnels, ropeways, and causeways, and other means of communication, subject to such conditions, as regards control over construction and maintenance of means of communication declared by the Viceroy, acting on the advice of the Cabinet to, be of military importance, and as regards incidence of special expenditure connected therewith, as the Viceroy, acting on the advice of the Cabinet, may prescribe.
(c) tramways within Municipal areas; and
(d) light and feeder railways and extra-Municipal tramways, in so far as provision for their construction and management is made by Provincial legislation; subject to legislation, by Parliament in the case of any such railway or tramway which is in physical connection with a main line or is · built on the same gauge as an adjacent main line.