One Word, Two Meanings: Who Decides What "Sex" Means in Article 15?

The Constitution Uses the Word "Sex" Twice in Article 15 and Never Defines It Article 15

does two things with the same word. Clause (1) forbids the State from discriminating on grounds of sex. Clause (3) then allows the State to make special provisions for women. The Constitution never says what "sex" or "women" means. That silence is the real subject of the petition the Supreme Court took up on 28 October 2026.

The

Rule as Interpreted: NALSA Widened the First Use In NALSA v. Union of India (2014), the Supreme Court read "sex" in Articles 15 and 16 to include gender identity. It recognised transgender persons as a third gender and held that the right to self-identify one's gender flows from dignity and autonomy under Article 21, expression under Article 19(1)(a) and equality under Articles 14, 15 and 16.

Puttaswamy (2017) later strengthened the autonomy reasoning by recognising privacy as a fundamental right. What NALSA did not settle is whether its wider reading of "sex" also governs clause (3). Does "women" in Article 15(3), the clause behind reservations and sex-specific protections, include anyone who self-identifies as a woman?

That question was not before the Court in 2014.

The Case Against the Current Regime Women's Declaration

International argues that the answer must be no. It accepts that people may hold and express gender identities. Its objection is to the State replacing the sex marker in official records with a person's professed identity.

Those changed markers, it says, now flow into Aadhaar, voter IDs, passports and birth certificates, diluting protections meant for biological females. The petitioner's counsel pointed to panchayat reservations and prison accommodation as protections at risk.

The Solicitor General raised a hypothetical about how sex-specific safeguards in arrest procedure would apply. The petition also argues, as reported, that the regime compels citizens to affirm belief in gender identities.

The Case for Self-Identification

Transgender rights advocates see the issue differently. For a community that faces discrimination, violence and exclusion from jobs and services, documents that match one's identity are not a preference but a precondition for living safely.

Requiring biological sex markers or medical certification, they argue, erases their existence and violates privacy and self-determination under NALSA and Puttaswamy. Pending petitions already challenge the 2019 Act's requirement of surgery-backed medical certificates for a male or female marker and the 2026 Amendment, which petitioners say removes statutory recognition of self-perceived identity.

The Real Question: Who Decides and for What Purpose

Both sides are invoking equality and both can point to the Constitution. The deeper question is whether the law must use one definition of sex for every purpose. One possible route is purpose-specific: documents and anti-discrimination protection follow self-identification for dignity, while a narrow set of sex-specific protections defines eligibility by its own purpose, with reasons stated.

That raises the question of who draws the lines. Parliament has already made a choice through the 2019 Act's certification model. The Court now has to decide how far that choice or the WDI's challenge, can go without unravelling NALSA.

Why This Matters for the Exam

This case shows that rights rarely collide because one side is wrong. They collide because the text left a word undefined. In Article 15, the same word protects against discrimination in one clause and enables special provision in another and India must now decide whether it means the same thing in both.