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Sex Self-ID
Resources & Information.

This is your one-stop shop for all self-ID resources.

We aim to provide a range of  information on the new legislation and we can provide advocacy in some circumstances.

In particular we want to explain what it does and doesn't do,  and how you can help.

The following items start with a basic overview (thanks to The Department of Internal Affairs), a printable flyer,  and lead on to a full opinion on the ins and outs of the legislation.

DIA Information

What does the Department of Internal Affairs say?

The Department of Internal Affairs is the Government Department responsible for the operational regulations around Sex Self-ID. They will be managing the birth certificate changes, as they are currently responsible for births, deaths and marriages registrations.


They have also released some very useful and clear FAQs on the actual impacts of self ID - beyond the administrative changes.

If you are a service provider and you are questioned on your choice to provide single-sex spaces then they are a good place to start. Likewise, if you are a person who wants to question a service provider on their approach. 


For the full FAQs go to the DIA website.

Questions about the implications of self-identification for service providers.

What does the new law say about how service providers should consider birth certificates as evidence of sex or gender?

The new legislation clarifies how birth certificates can be used as evidence of sex or gender. Where service providers need to determine someone’s sex or gender, other factors can be considered over and above the sex listed on a birth certificate. This reflects the fact that birth certificates are not intended to be considered evidence of a person’s identity (usually birth certificates are provided with other documents such as a driver licence or passports to prove identity).

What will self-identification mean for single sex spaces and activities such as changing rooms and sports teams?

The self-identification process should not affect how access to single sex spaces or sports is determined. Birth certificates are not usually used to determine a person’s right to access single sex services or spaces.

Organisations and individuals can continue to rely on their own policies rather than birth certificates. For example, it is still up to individual governing bodies to determine how sex and gender are determined in sport. It is also still up to individual schools to discuss with learners, parents, caregivers and whānau what name and gender learners use, regardless of the details on their birth certificates. 

Self-ID Flyer

Self-ID Flyer.

We need facility and service providers and the people using the facilities and services to be aware of their rights and obligations.


Many service providers include trans-identifying males in their women's spaces because they think they have to! They are not aware of their obligations to provide services that are safe for women - in some cases it is discriminatory not to provide these services.


This flyer can be download and shared as a pdf - you can print it and deliver to businesses who you think need to know the situation.

If you would like to organise a leaflet drop in your area then please contact us.

Sex Self-ID Poster SUFW
SUFW Opinion

Opinion regarding the provision of single sex facilities.

In September 2022, Speak Up for Women (SUFW) was provided with a legal interpretation of the Births Deaths and Marriages Relationship Registration Act (BDMRRA). From this opinion we provide the following guidance.

Our original article on how self-ID works with the Human Rights Act is here.


Please note that in the interests of clarity and consistency, SUFW uses the term “trans-identifying male” to describe a male who claims to be a woman.


It is the view of SUFW that:


  1. It is lawful for providers of sport and recreation services to maintain or provide separate facilities or services for each sex on the ground of public decency or public safety, and;

  2. Trans-identifying males and other gender diverse males are not always women when “sex” is being determined (because section 79(2) of the Births, Deaths, Marriages, and Relationships Registration Act 2021 allows consideration of biology as relevant information for the purposes of ascertaining sex for a particular purpose).

  3. Women-only facilities that exclude trans-identifying males would not be unlawfully discriminating against trans-identifying males on the basis of sex, and would not be in breach of the Human Rights Act.


The SUFW opinion is briefly stated, but note that we are familiar with the Crown Law Office opinion which suggests that “sex” in the Human Rights Act may include “gender”, and with the various cases which explore the issue of when a reference to a woman may include a trans-identifying male. 


Section 44 of the Human Rights Act says that it “shall be unlawful for any person who supplies goods, facilities, or services to the public or to any section of the public— (a) to refuse or fail on demand to provide any other person with those goods, facilities, or services; or (b) to treat any other person less favourably in connection with the provision of those goods, facilities, or services than would otherwise be the case,— by reason of any of the prohibited grounds of discrimination” – which include sex (s 21(1)(a)).


Section 46 says that “Section 44 shall not apply to the maintenance or provision of separate facilities or services for each sex on the ground of public decency or public safety.”

The repeated response we have received from service providers is that providing certain areas exclusively for women would be discriminatory because “[b]y law, we cannot discriminate, and trans women and gender diverse people who identify as women are women”.


Section 79 of the Births, Deaths, Marriages, and Relationships Registration Act 2021 says:


(1) A certificate issued under this Act is admissible as evidence in any legal proceedings and is presumed, in the absence of evidence to the contrary, to be an accurate record of the information recorded in the registry as at the date of issue.


(2) Any individual, private sector agency, or public sector agency authorised or required to ascertain an individual’s sex or gender for a particular purpose may take into account either or both of the following:

(a)  the information contained in a certificate issued under this Act:

(b)  any other relevant information.


Section 79(2)(b) is a clear indication of three things:


Firstly, that the BDMRRA recognises a distinction between sex and gender because it uses both words, rather than only one.


Secondly, it is anticipated that sex or gender may need to be determined for particular purposes.


Thirdly, that sex can (not must) be ascertained by reference only to relevant information excluding a person’s birth certificate.


Putting section 79 of the BDMRRA together with the Human Rights Act provisions, the exception in section 46 of the HRA allows discrimination for the stated purpose, on the basis of sex, and sex, at least in the section 46 context, is capable of being different to gender. Sex can be determined on the basis of relevant information that is not a person’s birth certificate, and for present purposes, that information will almost always be the biological indicators that include human females, and exclude human males.




Therefore, our conclusion is that the service providers are incorrect when they assert that “people who identify as women are women for the purposes of s 46 of the HRA”. 

Service providers  are entitled to positively discriminate by sex in favour of women, and to determine sex for that purpose by reference to biological indicators which cannot be changed or identified out of.  It is a matter for each service provider whether they choose to do this, but a refusal to consider doing it, made on the basis that doing it would be unlawfully discriminatory, is an error of law.


We have seen occasions where the service provider has cited the positions taken by the Human Rights Commission and the Ministry for Women, which include that “trans women are women.” These are policy positions, not required by the relevant law. 

SUFW believes that these positions are harmful to the needs and rights of women and girls for spaces and services that, in some instances, are separate to those which meet the needs of men and boys. 

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