absentee voting (i.e. by mail) or proxy voting is not allowed in the closed 2020 iowa democratic caucuses, where only registered democratic iowans (who meet the requirement of being minimum 18 years old by november 3, 2020) can vote by their physical presence at their designated precinct caucus site. iowans who have not registered as democrats before the caucus day, can still register as such on caucus night itself at their designated precinct, and hereby gain full voting right at the event.