On the 28 April 2009 the AER released its final decision and distribution determination for ActewAGL.

On the 27 February 2012 ActewAGL Distribution (ActewAGL) notified the AER that it had identified two errors in its distribution determination. ActewAGL requested that the AER use its discretion under clause 6.13 of the transitional National Electricity Rules to correct the errors. Under this clause the AER can revoke and substitute a distribution determination if it appears to the AER that the determination is affected by a material error or deficiency.

The AER has considered ActewAGL's application and revoked the 2009-14 distribution determination, and substituted a new distribution determination for the 2009-14 regulatory control period, to rectify the errors.