Australia’s landmark social media minimum age regime, which officially commenced on 10 December 2025, is heading to the High Court for a major constitutional test. The legal challenge, supported by the Digital Freedom Project and Reddit, disputes the validity of the under-16 ban and raises significant questions about the privacy of age assurance technologies. With key hearings scheduled for early 2026, the outcome will determine how the law defines social media platforms and the extent to which the government can regulate digital access for young Australians.