When is a NDB approach not an NDB approach?

[Tee Emm]

Question for the airline experts. Let's say the IRE requires you to conduct an NDB approach during an instrument rating test. Your aircraft is dual GPS equipped with a sophisticated state of the art flight management computer system. You are told by the IRE to conduct the NDB approach on autopilot coupled to the flight management system so the aircraft is actually flying a dead accurate track using the GPS updated FMS. In other words the instrument rating test to tick off the NDB approach is not a test of the competency of the pilot flying an NDB approach but more a test of his skill at monitoring an autopilot that gets its information from sources other than an NDB needle.

Question 1. Is this method a valid skill test of the pilot to fly an NDB approach using both vertical and lateral tracking via an FMS updated by a GPS?

Question 2. If not, would it be correct to say that the original intent by the regulator for initial issue and renewal of an NDB approach during an applicant's instrument rating test was to test the applicants ability to fly an NDB approach without the use of other navaids apart from the DME.

Note: I understand that GA ATO's are not permitted to allow candidates undergoing instrument rating tests to use autocoupled GPS tracking for the NDB competency test. That being so, one wonders why CASA is inconsistent in their regulation of instrument rating tests especially as the CIR is not type specific.