Human rights — Discrimination — Sex discrimination — Convention on the Elimination of All Forms of Discrimination Against Women, 1979 — Travaux préparatoires — Objects — Concept of discrimination under Convention — Whether requiring denial of equality of treatment in relation to men — Application to distinctions made on basis of marital status — Married person undergoing change of gender — Whether discriminatory to refuse alteration to register of births on grounds of marital status — Convention on the Elimination of All Forms of Discrimination Against Women, 1979, Articles 1, 2, 3, 5(a), 11(2)(a), 16(1)(d) — The law of Australia