Starting Monday, transsexuals will be allowed to alter their name and sex on identity documents in Mexico City, reports the Spanish news agency EFE.

Transgender men and women wishing to alter their identity will need to provide a birth certificate and proof of their altered sex. Documentation consists of a report issued by two specialists certifying a sex change – whether or not that involves surgery.

Mexico City Assemblyman Jorge Carlos Diaz Cuervo, of the Alternative Social Democrat party, supports the initiative. He told EFE that the measure will lower discrimination against transgender people.

Mexico City's left-leaning assembly approved a controversial gay civil unions measure in 2006. Criticized by the Catholic Church and conservative groups in the country, the law does little more than offer estate planning for gays and lesbians who register with civil authorities.

The first gay couple to register their union was journalist Antonio Medina and economist Jorge Cerpa.

Mexican citizens who have begun or are in the process of “[sexual] reclassification” and are interested in altering their name and sex on identity documents such as birth certificates should make their request at one of the 42 family courts in the city.

The law will apply only to residents of Mexico City, one of the most populous cities in the world with 8.7 million residents.