 The bill received royal assent on 8 December 2017 and went into effect the following day.Same-sex marriages lawfully entered into overseas automatically became recognised from that date, and the first weddings after the normal one-month waiting period occurred from 9 January 2018.Several same-sex couples successfully applied for an exemption from the one-month waiting period, and the first legal same-sex wedding under Australian law was held on 15 December 2017, with further weddings taking place the following day.