On 28 April 2004 the ACCC approved the release of its draft revenue cap decision for TransGrid.

On 18 June 2004, the ACCC held a public forum so that interested parties could state their views on the draft revenue cap decision for TransGrid.

The ACCC called for interested parties to make submissions to its draft revenue cap decision for TransGrid.

During the course of the ACCC’s assessment of TransGrid’s revenue cap application, the ACCC considered that there would be advantages to changing to an ex-ante assessment regime for future capex. TransGrid requested that it be able to resubmit its future capex application to ensure that it complied with the requirements of the new regime.

On 18 November 2004 TransGrid submitted its capex program to replace its previous capex program.

The ACCC engaged PB Associates and Mountain Associates to provide expert advice on TransGrid's revised transmission investment program application.

The ACCC called for interested parties to make submissions to its consultants' review of TransGrid's revised capex proposal.

On 3 March 2005 the ACCC released its supplementary draft decision for TransGrid's revised capital expenditure application.

On 18 March 2005 the ACCC held a public forum in Sydney so that interested parties could state their views on the supplementary draft decision for TransGrid's capital expenditure application.

The ACCC called for interested parties to make submissions to the ACCC's supplementary draft decision on TransGrid's revised capital expenditure application.