PDFWAC 296-869-20055
Aerial ladders.
(1) You must secure aerial ladders in the lower traveling position, using the locking device or other means provided by the manufacturer, before moving it for highway travel.
(2) You must make sure all persons working from an aerial ladder wear a full body harness and lanyard attached to either:
(a) The manufacturer's recommended attachment point; or
(b) The ladder rail if the manufacturer does not specify an attachment point.