A lesbian student in Indiana, US, has been allowed to wear a tuxedo to her school prom.

The anonymous student sued Lebanon Schools last week, complaining that the school’s special dress code for prom required her to wear a formal gown, discriminating against her and violating her rights to expression.

A statement from Superintendent Robert L Taylor said: “School policy for this year’s prom will be that all attendees shall wear appropriate formal attire with no gender-based attire requirements imposed. Female students will be permitted to wear tuxedos if they choose.”

Ken Falk, legal director of the American Civil Liberties Union of Indiana, who filed the lawsuit on the student’s behalf, said she was pleased at the outcome and would be wearing a tuxedo to the event.

He told the Indianapolis Star: “”We think this is what the decision should have been all along, that there was never any justification for the policy. It’s unfortunate that we had to go this far.”

Lambda Legal, the LGBT charity, has released a prom guide for gay and trans students.

The document offers advice to teens on dress codes, same-sex dates and safety.