An Australian senator resigned after revealing she holds dual Canadian citizenship.

Larissa Waters, the co-deputy leader of the Greens party resigned since Australia’s constitution bars dual citizens from eligibility for election. She had the Canadian citizenship since birth. In a statement she said,

“I left Canada as a baby, born to Australian parents studying and working briefly in Canada before they returned home,” she wrote. “I have lived my life thinking that as a baby I was naturalised to be Australian and only Australian, and my parents told me that I had until age 21 to actively seek Canadian citizenship.”

However, she discovered that due to a decades-old law, she had been a dual citizen from birth, and a law changed a week after she was born required her to actively renounce her Canadian citizenship.