Mark Lundy's sister wants him freed from prison to live with her as he prepares for a second murder trial.
Caryl Jones said last night that she hoped her brother would be bailed to her Taupo home.
She had kept the ruling secret for 24 hours after receiving a phone call from Lundy on Sunday night.
"We're absolutely over the moon. The Privy Council was obviously listening to what was being told to them. It was a big 'wahoo' moment," she said of learning the news.
Mrs Jones said the next step was getting her brother released. "We'll get the application lodged as soon as possible and hopefully he'll be bailed to my house."