There must be a PO present at the Worksite for the period of the work.
A PO must:
conduct a pre-work Safety Assessment;
ensure 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;
tell Workers about the Locations of Safe Places;
determine the number of Lookouts needed to protect the work; and
ensure Lookouts do not work continuously at the same Location for more than 60
minutes.
NOTE
A PO must be satisfied that other work will not interfere with Protection
duties.