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The target date for VOZ to become currency is calendar year 2024 with VOZ-based trading through VOZ-derived TAM Quarter Hour files after agencies and broadcasters have had time to systematically work towards this transition. TAM Quarter Hour audience files derived from VOZ will be identical in structure and frequency but with a reduced set of demographics. OzTAM, Regional TAM and the broadcasters aim for minimal disruption in order to preserve business continuity.