Hi Carmel
What Section of the Act are they requesting rates exemption under? If they are requesting exemption they should be telling you what section they are applying under?
If its under 556 (h) land that belongs to a public benevolent institution or public charity and is used or occupied by the institution or charity for the purposes of the institution or charity, which Im guessing they would be applying under they should provides their Articles of Association/Governing Document.
Also I’d do a title search to confirm ownership.
There is a lot of caselaw on the under the Case Law link that deals with similar matters.
Robert