Note that this standard has been updated and you will need to meet the requirements set out in AS 3891.1:2021 Air Navigation - Cables and Their Supporting Structures - Marking and Safety Requirements Marking of Overhead Cables and Supporting Structures.
You will require this standard if you are constructing or placing aerial lines in the vicinity of an airport or airfield. This standard applies to electricity network operators and employees involved in design, installation, maintenance and management.
It specifies requirements for permanent marking of overhead cables and their supporting structures for visual warning to pilots of aircraft.