Zack Polanski out as Green Party Leader by...?

Resolution rules

This market will resolve to “Yes” if Zack Polanski ceases to be Leader of the Green Party of England and Wales for any period of time between market creation and the specified date, 11:59 PM ET. Otherwise, this market will resolve to “No”. An announcement of Zack Polanski's resignation/removal by this market's end date will immediately resolve this market to "Yes", regardless of when the announced resignation/removal goes into effect. The resolution source for this market will be official information from Zack Polanski and the Green Party of England and Wales; however, a consensus of credible reporting may also be used.