On 29 April 2005 the ACCC released its decision regarding TransGrid's revenue cap application for the regulatory period 2004/05 to 2008/09.
On 2 February 2007 the AER decided to revoke and substitute TransGrid's 2004/05 to 2008/09 revenue cap under clauses 6.2.4(d)(2) and 6.2.4(e) of the National Electricity Rules.