[Phase 3] HIP-56 - Length of stay of the Mission Board Members

From the approval of this HIP with a majority of votes in phase 3 on the Snapshot platform, the elected members of the mission board will not be in power for longer than the option with mayority of votes, from the moment of their appointment to office. The re-election of each member will be possible and it must be held before the end of their term, within the same period.