Structural subsystems: duties on owners
24.—(1) The owner of any structural subsystem that is in use on, or is part of, a rail network scheme, shall ensure that while it remains in his ownership—
(a)it continues to conform to any TSIs and any notifed standards against which it was assessed; except that where those standards have been varied and appropriate replacement parts which conform to them are no longer available, it conforms to those varied TSIs or notified standards;
(b)any maintenance manuals in relation to that structural subsystem are added to and kept as part of the technical file; and
(c)any alterations made to the structural subsystem are documented and that documentation is added to and kept as part of the technical file.
(2) The owner of a structural subsystem will be deemed to fulfil the requirements of paragraph (1) if another person with a legal interest in that structural subsystem is fulfilling those requirements.