There must be a PO present at the Worksite for the period of the work.
A PO must be satisfied that other work will not interfere with Protection duties.
A PO must:
make sure that work in the Danger Zone does not begin before the required safety
measures are in place;
be responsible for the Protection of Workers from Rail Traffic;
make sure the Tracks between Worksites and protecting Locations are kept clear of
obstructions;
make sure that Worksites are protected against the Unauthorised entry and exit of
Rail Traffic;
must effectively communicate with the PPO;
tell Workers about the Locations of Safe Places before work begins; and
tell Workers if the Protection arrangements change