A Northland high school is going to extremes to make sure their ball is a strictly formal occasion.
In a newsletter published to Kerikeri High School's website, parents and students were given stringent guidelines for what is and isn't allowed at the event.
"Our ball is an important occasion. We maintain a high standard of dress with the intention of enabling every attendee the experience of a formal ball," the newsletter reads.
All dresses must be of a length that reaches below the ankle bone of the wearer while low-cut, high-slit and cut-out varieties are banned entirely.
For those wearing suits, they must consist of one colour only and ties must be worn at all times. Dress shoes are the only footwear allowed.
The descriptions were accompanied by pictures and diagrams that further outline the firm instructions.
The newsletter states that any students who do not adhere to the guidelines will be denied entry to the ball and only allowed in if they change their clothes to meet the requirements.
According to the school, the dress code was created by an advisory group that included students.
"Our ball dress student advisory group have produced these guidelines to help you determine what is or is not suitable so that you can be clear about what to wear and enjoy your evening," the newsletter adds.