| 02/12/2016 | ACCC commenced review under the Merger Process Guidelines. |
| 22/12/2016 | ACCC requested further information from the merger parties. |
| 23/12/2016 | Closing date for submissions from interested parties. |
| 13/01/2017 | ACCC received further information from the merger parties. |
| 08/02/2017 | Former provisional decision date of 16 February 2017 delayed by ACCC to allow additional time to consider the proposed acquisition. |
| 23/02/2017 | ACCC published a Statement of Issues outlining preliminary competition concerns. |
| 06/03/2017 | ACCC requested further information from the vendor. |
| 10/03/2017 | Closing date for submissions relating to Statement of Issues. ACCC assessing information provided during market inquiries and consulting with merger parties on any relevant issues or concerns arising. |
| 16/03/2017 | ACCC received further information from the vendor. |
| 23/03/2017 | Former proposed decision date of 6 April 2017 delayed by ACCC to allow additional time to consider the proposed acquisition. |
| 18/04/2017 | Following South32's announcement that it will not proceed with its proposed acquisition of Metropolitan Collieries, the ACCC discontinued this review. |
