, no national law exists to expressly deal with discrimination or harassment on the basis of sexual orientation or gender identity, although the Autonomous City of Buenos Aires and the city of Rosario (the third most populous of the country) do include sexual orientation in their civil rights and anti-discrimination laws. On 13 August 2010, the Chamber of Deputies approved an amendment to the anti-discrimination law banning discrimination based on sexual orientation and gender identity, but it was not voted by the Senate. A new proposal was introduced in May 2013.