Generic Asbestos Management Plans - Any examples of how "reasonably presume" is being used? My god, so many cans with so many worms.
The practical application of all of the above is actually the most important, not the fact of "holding an AMP". I could wave around a drivers licence manual all day claiming I can drive a car safely, but really?
I sincerely doubt if audited Worksafe would be happy with a blanket plan where the risk of asbestos exposure rises considerably where brown or blue asbestos may be present, without any effort to identify I would have a field day with my fine book (if I were an inspector). Without sampling directly from suspected materials, and without evidence of it in action, any generic plan is immediately moot.
By practical application I mean (briefly):
Has the PCBU(s) advised inhabitants and contractors that asbestos maybe present in the building?
Do contractors provide reasonable AMP's for the work they do in these buildings, you can presume cladding is white asbestos? Why? Bear in mind pre 1985's (estimate) Hardy ACM products contained brown asbestos also, these were mass produced and installed in nearly every Goverment buidling in the 70's, hospitals, schools and so on.
This was in roofing, cladding, insulation, gaskets, brake pads and even some concrete fencing. Some internal ceilings (the sparkly type) was a spray on material including blue asbestos.
The investor is expected to spend a portion of profit on safety, especially one that size. That budget could easily include a builder to take samples of some suspected materials (trust me they will know) for testing, then the AMP becomes relevant.
It would be reasonable to expect on acquisition of a property the investor (making this his/her primary income) would have knowledge to do such due diligence before handing over the cash, im pretty sure the law would see it that way.
End of the day, any property investor has the onus to ensure its properties purchased are compliant and significant risks controlled, for occupants and contractors. Builders, electricians and plumbers are most at risk here.
Sounds like a case of "if I don't know, I don't have to do".
If you have concerns, contact your local asbestos removal company (a reputable one) and do a limited sample from inside the ceiling and any concrete products and building materials, go back to the Landlord with the results. Once they know, they must do, then forward them the bill :)