Former Maori broadcaster Claudette Hauiti, next in line to take over from Aaron Gilmore, is in a civil union and raising a child with her partner.
She has publicly admitted she "ticks all the boxes" on National's representation scale.
The party's general manager, Greg Hamilton, confirmed last night Ms Hauiti would be asked by the Electoral Commission to enter Parliament.
"She's the next on our list ... she'll need to make a decision on whether she would want to do that."
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Ms Hauiti, who is 63rd on the party's list of 75, has a 5-year-old daughter, Manawa, with her partner, Nadine Hauiti-Mau.
The couple plan to marry next year.
A former producer, Ms Hauiti founded TV and film production company Front of the Box Productions in 1993 and has worked mainly in Maori and Pasifika media.