This issue seams to go on and on and on!
Some brigades have taken it upon themselves to put them around their area (ie in an Urban area Happy Valley), whilst others have arranged for SAWater to use their areas as test cases (ie just out of Port Pirie on Hwy 1)
CFS/MFS and SAWater seam to have this ongoing problem about who's responsible for their instillation and maintenance - the CFAct 1989 states
"Interference with fire plugs etc
60. A person must not—
(a)cover up or conceal a fire plug or hydrant; or
(b)remove or obliterate any mark, sign or letter used to indicate the position of a fire plug or hydrant.
Penalty:Division 7 fine."
Only problem - it fails to say who should put them in!
When you travel interstate you see a number of combinations, blue markers, blue markers with yellow arrows and alike - but the common thread is blue markers.
Unfortunately maybe this is yet another political issue that will take a death or similar to resolve.
Small problem to resolve, however it continues to be a great and grave problem.