Leadslead, you can stick "advisory" material up the proverbial along with "accepted" operations manuals, "appropriate" procedures and "satisfactory" compliance.
CASA uses these meaningless words to screw all of us, all the time.
If CASA had as part of its charter the requirement to foster the good health of the industry then the use of the term "advisory" would be no problem because by definition they could not then "advise" us to do anything deleterious to industry.
However, as we are constantly told, CASA is a safety regulator and nothing else, that by its own statements knows exactly what is required to be safe, then I believe we are entitled to be told exactly what is required of all of us to comply exacty with CASAs exacting requirements and therefore avoid even the slightest possibility of Administrative punishment, let alone prosecution.
To put that another way, CASAs total insistence on adherence to black letter law is totally, logically and morally inconsistent with "advising" us to do anything. Us compliant serfs are entitled to be told exactly what is required and we should demand nothing less!