OBS_VALUE: Although notification in mergers is voluntary, the ACCC expects to be notified in advance, where the merged firm will have a post-merger market share greater than 20 per cent in the relevant market. For transactions that occur wholly outside Australia but that affect Australia, the Commonwealth Treasurer, the ACCC or any other person may apply to the Australian Competition Tribunal for a declaration if the acquisition of a controlling interest in a corporation that carries on business in Australia would have the effect of substantially lessening competition in a market in Australia (local effect/nexus test).Final report of the Digital Platform Inquiry: https://www.accc.gov.au/system/files/Digital%20platforms%20inquiry%20-%20final%20report.pdf