as of january, 2018 a group had submitted over 300,000 signatures for the 2018 michigan marijuana legalization initiative pending certification by the state for the 2018 general election ballot. the state certified the initiative on april 26. proposal 1 was approved by voters on november 6, and the secretary of state certified the election returns as of november 26, and as such, the proposal must become law in michigan by no later than december 6.