“Requirements as regards railways, canals, etc.

15A.—A road authority shall not construct or reconstruct a bridge or viaduct over, or a tunnel under—

(a) a railway, save with the consent of the Minister for Public Enterprise, or

(b) any inland waterway within the meaning of the Minister for Arts, Heritage, Gaeltacht and the Islands (Powers and Functions) Act, 1998, or any navigable water, save with the consent of the Minister for Arts, Heritage, Gaeltacht and the Islands.”.