Hi there— Property and Voting used to be sex based rights, but these days the entire march of jurisprudence is towards recognise people's universal human rights and their civil and political rights—which are universal with some qualifiers such as nationality. For example, I have the universal right to vote in the UK, where I'm a citizen, but not in France, where I'm not. In both the UK and France though, because both States are signatories to treaties which recognise Universal Human Rights I have human rights.
Certain pieces of legislation makes it an obligation to allow groups of people who have difficulty accessing their human rights, their civil and political rights and equality rights to make it possible to access these rights.
Example: A disabled person claims they cannot access the Town Hall, and are being discriminated against.
The Council Leader says "Don't be daft, EVERYONE is allowed to access the town hall, we have no specific rules which say you can't come in!"
The disabled person then points out they can't because of the stairs.
In this case, there's a de facto bar on the disabled person them from a public building, which means the Council is in breach of the Equality Act, because they've not made it possible for the disabled person to access the Town Hall, AND the Human Rights Act, because in order to pull themselves up the steps the right of bodily autonomy (Article 8 ECHR) and the right to be free from degrading treatment (Article 3) are not being respected.
The solution is not telling the wheelchair user to stay home, but to build a wheelchair ramp so they can access their right to enter the public building.
Universal Human Rights are of course where teh concept of rights are: no one has 'special rights' because of their sex. What we have is the recognition that the State has a responsibility to ensure our universal human, civil and political rights are repected and facilitated.
Whenever we talk about equalities: when we talk about BAME rights, or Disability Rights, or Women's Rights, or LGBTI rights, what we're saying is everyone has these rights but SOME groups require advocacy and actions on the part of government because of systemic inequality, to access their rights. The right to an abortion, for example, is thought of as 'women's rights', but in the framework of human rights it falls under the right to bodily autonomy—a right which everyone has. Everyone has the right regardless of age, or sex, or gender identity or ethic origin, to their right to bodily autonomy and to the right healthcare for their bodies. Women's rights campaigners fought hard for the right to bodily autonomy to be recognised and facilitated by the UK government.
Its extremely dangerous to start advocating that there are 'sex based rights' because it undermines the entire concept of universal human rights—and it also creates a fascistic/conservative 'flip side' of 'sex based responsibilities.' We don't want the State to determine we have special 'responsibilities' because of our genetalia. That's been tried in the 20th Century in Germany and in Russia, with disastrous consequences for women. I don't want Boris to start demanding I have babies for the Fatherland, right?