In 1989, Judge Mario Calatayud of Room F of the National Chamber of Civil Appeals of Buenos Aires, in dissent with the presiding majority, granted the first recognition of the gender identity of a trans woman who had requested a change to her registered name and sex.
[4][5][6] Using a strategy almost identical to that with which approval of the same-sex marriage law was achieved, several amparo cases were brought before the Tribunals in Contentious Administrative and Tax Matters of the City of Buenos Aires with the purpose of ordering modifications to the registered name and sex of trans individuals.
[8] On 8 November 2011, the author and the General Legislation and Justice Commissions of the National Congress discussed the bill presented by deputies Diana Conti, Juliana Di Tullio, and Silvana Giudici [es],[9] and approved its dispatch for further processing.
On 26 May, the Office of the United Nations High Commissioner for Human Rights issued a statement of congratulation for the law, saying "Argentina has taken an important step to guarantee equality, respect, and dignity for trans people.
[14] The law also grants access to hormonal treatments and total or partial surgical interventions for the purpose of transitioning, without the need of a previous gender dysphoria diagnosis or a referral letter from mental health professionals.