Senate rejected Cash's bill defining sex as fixed at birth
Senator Michaelia Cash, a Liberal senator, brought this bill. It would have let women's refuges, bathrooms, sports and apps keep out people of the other birth sex. It would have won over state laws. The Senate refused it on 1 July 2026.
Official name: Sex Discrimination Amendment (Restoring Common Sense and Recognising Biological Sex) Bill 2026
- Sex in the Sex Discrimination Act would mean sex at birth, male or female. Nothing after birth could change it.
- Running a single-sex service, space or activity would not count as unfair treatment because of sex or gender identity.
- That would cover places like refuges, bathrooms, hospital wards, sport, schools, prisons, clubs and online apps.
- This would win over any state or territory law that said something else.
- The Senate voted it down at the very first step on 1 July 2026, the day it was brought in.
Who it affects
- Transgender people: Transgender people live as a gender that is not their birth sex. They could legally be kept out of single-sex spaces, services, sports and jobs that match their gender identity.
- People who run single-sex services: Women's shelters, clubs, sports bodies and apps could limit entry by birth sex without breaking federal or state law on unfair treatment.
- Intersex people: Intersex people have bodies that are not clearly male or female. Where their sex was written down wrongly at birth, their body's real sex would count under the law.
- Insurers and super funds: Policies and members they already had would keep the old rules.
What sex discrimination law covers
The Sex Discrimination Act 1984 is a federal law. It makes it against the law to treat people unfairly in public life because of things like their sex and their gender identity.
Gender identity is how a person sees their own gender. It can be different from the sex they were given at birth.
Senator Michaelia Cash brought this private bill to the Senate on 1 July 2026. A private bill is one that does not come from the government. The Senate is the second house of Parliament, which checks bills.
The sources have no notes from her explaining the bill. The bill's own opening statement points to recent court decisions in 2026. It says they have left people unsure when single-sex spaces are allowed. It says people running them face complaints, costs and court cases.
Two earlier bills on this topic took gender identity out of the law. This one kept it in. It added new rules on top.
New aims for the Act
The bill added to the law's opening statement. It said biological sex, meaning the sex of your body, is "a real and enduring characteristic". It said single-sex spaces are a fair way to protect privacy, dignity and safety.
It added two new aims. One was to make biological sex the basis for who counts as a woman or man under the law.
The other was to protect the safety, dignity, privacy and equal treatment of women and girls, and men and boys. This would be done through single-sex spaces and services.
What sex would mean
A new section 4C said sex means a person's sex at birth. That is male or female, decided by their genes and the body parts for having babies.
Nothing after birth would change it. That includes surgery, hormones or other medical care. It also includes a new birth certificate or ID.
A man would mean a person whose sex is male, and a woman a person whose sex is female, at any age.
The law would only see two sexes. Any mention of a different or opposite sex would mean the other of male or female.
An intersex person is born with body features that do not fit typical ideas of male or female. If their sex was written down wrongly at birth, their body's real sex would count.
Single-sex spaces and services
A new section 30A was about single-sex spaces and services. It said setting one up, running it or keeping it would not count as unfair treatment because of sex or gender identity. This would apply whatever else the law said, including the protection for gender identity.
A single-sex space or service is anything limited to one sex. It is there to protect the safety, dignity, privacy or equal treatment of women and girls, or men and boys.
The bill listed examples. These were shelters, refuges and crisis services, bathrooms and change rooms, and hospital wards. They also included sport and picking teams, schools and courses, places to stay and prisons, clubs, and jobs linked to any of these.
Online services counted too. The bill's own note uses an app where women make work contacts as an example.
It would be legal to refuse entry to someone who identifies as the other sex. It would be legal to limit what they can join, or to not hire them.
The bill's note says a women's shelter could turn away a person born male who identifies as a woman. The same would apply the other way, for a person born female who identifies as a man.
Overriding state laws
States and territories have their own laws against unfair treatment. The bill said Parliament meant single-sex spaces to be legal whatever any state or territory law said.
So a state law might say turning someone away was against the law. The federal rule would win in that case.
When it would apply
The changes would only apply to things done after the law started. That would be the day after the Governor-General signed it. The Governor-General is the King's stand-in in Australia.
Insurance policies taken out before the start date would keep working under the old rules. So would super fund rules for people who were already members.
Senate refused to let it in
Senator Cash brought the bill in on 1 July 2026. The Senate voted it down at the very first step the same day.
That first step is when a bill is formally put before a house. It is normally agreed without a vote. Voting it down means the Senate refused to even take up the bill. It will not become law in this form.
How they voted
| Vote | Result |
|---|---|
| Vote to bring it in Senate, 1 July 2026 Labor 19 no, Liberal 14 aye, Greens 10 no, One Nation 3 aye, Nationals 2 aye, Country Liberal 1 aye, United Australia 1 aye, Independent 1 no | Noes won 30 to 21 |
Its journey through Parliament
| 01 Jul 2026 | Senate: Introduced |
| 01 Jul 2026 | Senate: First reading negatived |