Regulatory issues...

Reverse brick veneer construction is not explicitly covered in the relevant Australian Standards or BCA, which can cause some regulatory issues if you strike a particularly nasty pen-pusher.

Reverse Brick Veneer walls must comply with BCA Volume 2 Part 3.3 - Masonry, specifically 3.3.1.3 Internal Walls.

BCA Part 3.3.4 says the following regarding masonry walls.
3.3.4.2 Width of cavity
In brick veneer and cavity masonry construction, a cavity must be provided between the inner and outer masonry leaves or the masonry leaf and the supporting frame as follows:

(a) Brick veneer—not less than 25 mm width.

(b) Cavity masonry—not less than 35 mm nor more than 65 mm width.

In the case of reverse brick veneer the cavity is not required, as the masonry component is not exposed to the weather, but some building surveyors or other relevant approvers may insist on a cavity just to stick to the letter of the codes.

As far as Australian Standards go...AS1562 - Design and Installation of Sheet Roof and Wall Cladding can be relevant for the outer skin, while AS3700 - Masonry Structures and AS4774 Masonry in Small Buildings apply to the internal structure. The masonry component of the wall can either be structural, with the external cladding simply attached with battens, or it can be non-structural and rely on a timber or steel frame for support, in which case AS1684 - Timber Framing or AS4100 -  Steel Structures are also relevant.

Not being directly covered by the BCA or AS (on top of their natural resistance to trying anything new) also means that many builders or contractors will be reluctant to take on a reverse brick veneer construction.

Cheers,

  Glenn