On 29 November 2012, the AEMC published a draft rule determination and draft rule in response to a rule change proposal from International Power GDF Suez regarding transparency around requests to change the normal voltage level.

The Commission has determined to make a more preferable draft rule which requires the Australian Energy Market Operator (AEMO) to notify registered participants of a request to change the normal voltage level. The draft rule also requires AEMO to notify registered participants of the outcome of such a request. The AEMC considers that the draft rule would improve market transparency and efficiency by assisting registered participants to make more informed investment and operational decisions.