On 14 September 2017, DBCT Management Pty Ltd (DBCTM) submitted a document titled 'draft amending access undertaking' (Modelling DAAU) seeking to amend the financial modelling associated with the 2017 access undertaking. DBCTM said it would affect four areas:
- the calculation of outturn inflation
- the sharing of tax benefits
- tax considerations relating to the remediation allowance and
- the economic life of assets comprising the RAB.
The QCA began an investigation to decide whether to approve, or refuse to approve, the Modelling DAAU. The QCA received one submission on DBCTM's DAAU, from the DBCT User Group. The Modelling DAAU and stakeholder submission are published below.
On 15 December 2017 the QCA made a decision to cease its consideration of DBCTM's Modelling DAAU. The decision notice is published below.