The AEMC has published a draft determination on the Rule change request from Hydro Tasmania in relation to the limit allowed for temporary power frequency voltages at a connection point. Hydro Tasmania proposes that the limits on temporary over-voltages should be disassociated from the level of the normal voltage to allow for an increase in limits.

On 27 October 2011, the AEMC published a draft determination on Hydro Tasmania's Rule change request. The draft determination proposes to make no rule in respect of the proposed Rule change. Requests for a public hearing close on 3 November 2011. Submissions to the draft determination close on 9 December 2011.