This made her the first woman to officiate in a men 's rugby union international .
On 19 November 2016 Nievas served as an assistant referee at an international between Tonga and the United States at Anoeta Stadium .
This made Nievas the first woman to officiate in a men 's rugby union international .
On 19 November 2016 Nievas served as an assistant referee at an international between Tonga and the United States at Anoeta Stadium .