On 13 December 2022 significant amendments to the Sex Discrimination Act 1984 (SDA) took effect. These amendments introduced a positive duty on employers to eliminate unlawful sex discrimination in the workplace and prohibit a person from subjecting another person to a workplace environment that is hostile on the ground of sex. The positive duty provisions operate in a similar way to the positive duty on employers in work health and safety legislation to ensure, so far as reasonably practicable, the health and safety of workers. A hostile work environment is defined in the SDA as existing where a reasonable person, having regard to all the circumstances, would have anticipated the possibility of the conduct resulting in a workplace environment being offensive, intimidating or humiliating to the person the subject of the conduct by reason of their sex, a characteristic that appertains generally to persons of that sex, or a characteristic that is generally imputed to persons of that sex. Employers need to act now to comply with their obligations, ahead of the commencement of other amendments to the SDA which will take effect on 13 December 2023 which will provide the Australian Human Rights Commission (AHRC) with the power to conduct an inquiry into whether an employer is compliant and, if they are not, to issue a compliance order to them. Together with amendments to the Fair Work Act 2009 which will take effect on 6 March 2023, introducing a prohibition of sexual harassment in connection to work, these amendments to the SDA are a product of recommendations made in the Respect@Work Report (2020) of the AHRC.