After Greens senator Scott Ludlam was forced to resign last week following citizenship issues, a fellow politician has now followed suit.
Larissa Waters - another Greens senator - has also stepped down from her role in Parliament due to her dual citizenship with Canada.
Under section 44 of the Australian Constitution, persons with dual citizenship are "not permitted to stand for election and that a person must take 'reasonable steps' to renounce their citizenship of the other country."
Waters has been an Australian Senator since 2011 representing Queensland and was the deputy leader of the Greens.
She was born in Winnipeg, Canada before moving to Australia.