Human rights — Nationality, right to — Acquisition of nationality by naturalization — Proposal to increase residency and other requirements — Whether infringing right to nationality — Discrimination — On basis of nationality — Preferential treatment for applicants for naturalization who are citizens by birth of certain countries — Discrimination on grounds of sex — Different naturalization provisions for foreign men marrying female nationals and foreign women marrying male nationals — American Convention on Human Rights, 1969, Articles 17, 20 and 24

Nationality — Nature of nationality — Right to nationality as a human right — Grant of nationality within discretion of State — Extent to which that discretion regulated by international law

Aliens — Acquisition of nationality by naturalization — Conditions — Discrimination — Whether differential treatment of certain categories of aliens necessarily involving unjustified discrimination

Treaties — Interpretation — Ordinary meaning of terms — Context — Object and purpose of Convention — Vienna Convention on the Law of Treaties, 1969

International tribunals — Competence — Inter-American Court of Human Rights — Advisory jurisdiction — Provision for Court to give advisory opinions regarding compatibility of national laws with Convention — Whether including provisions of national constitution — Whether including draft laws