BCA, AS & RBV

As we are beginning the process of sketching the details of our wall design, one thing that keeps coming up is confusion over whether a RBV wall is required to have a cavity. I can't find any explicit reference to reverse brick veneer construction anywhere in AS 3700 or Part 3 of the BCA.

The BCA states (emphases mine):

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) Masonry - not less than 35 mm nor more than 65 mm width

(c) Except for mullions, the minimum width specified in (a) and (b) is to be maintained between the outer masonry leaf and any services, insulation or sheet bracing located in the cavity

(d) Where mullions are located within a cavity as permitted by (c), a vertical DPC must be placed between the outer masonry leaf and the mullion to prevent moisture penetration

The performance requirements of a waterproofing system proposed as an alternative solution to what is described in Part 3.3.4, refer to (bear with me!) Part 1.0.10 and Part 2.2.2:

P2.2.2 Weatherproofing

A roof and external wall (including openings around windows and doors) must prevent the penetration of water that could cause

(a) unhealthy or dangerous conditions, or loss of amenity for occupants; and

(b) undue dampness or deterioration of building elements

Basically, what I understand from this is that a cavity is required in masonry construction to prevent moisture penetrating through to the interior of the building, allow the moisture that does penetrate to escape and also to provide ventilation to prevent dampness.

Anecdotal evidence on the internets suggests some local councils, architects and engineers are insisting on a cavity, while the article I linked to earlier from yourhome.gov.au states:

No cavity is requited for RBV. The brick skin is laid tight to the wall frame without a cavity, as the external cladding provides the primary moisture barrier.

What do you guys think? Should we include a cavity in our RBV wall or not?