The report at
http://
www.defence.gov.au/
minister/
1999/
collins.html states:
<<In August 1991, because of the combat system schedule slippage, the contract was amended to provide a two-stage delivery. This was to allow submarine platform trials to proceed in advance of a fully compliant combat system being available.>>
Who wasn't involved in this decision to amend the contract ?

The book "Collins Class Submarine Story: Steel, Spies and Spin" lists key people.
Person 21 on its list of key people is
<<John Button, Minister for Industry 1983–93 [25 October 2005]>>