For the purposes of the Rail Safety Act 1997 , the following provisions apply:(a) if there is one Rail Infrastructure Manager for the entire rail network, the Rail Infrastructure Manager is taken to be the owner of the railways in the rail network;(b) if there is a Rail Infrastructure Manager for a part of the rail network, that Rail Infrastructure Manager is taken to be the owner of the railways in that part of the rail network;(c) if for the time being a part of the rail network does not have a Rail Infrastructure Manager, the Rail Infrastructure Owner is taken to be the owner of the railways in that part of the rail network;(d) if for the time being no part of the rail network has a Rail Infrastructure Manager, the Rail Infrastructure Owner is taken to be the owner of the railways in the rail network.