Peters became Acting Prime Minister on 20 June 2018 , when Ardern went into labour .
Ardern confirmed that she would temporarily relinquish her duties to Winston Peters , following the birth of her child , for a period of six weeks .
Winston Peters became Acting Prime Minister on 20 June 2018 , when Ardern went into labour .
Ardern confirmed that she would temporarily relinquish her duties to Winston Peters , following the birth of her child , for a period of six weeks .