Open Voting allows a chapter to choose to not specify parties. If you would like to not change the party throughout a round (you have a small number of PNMs, you just don't feel like it, etc.), then you can specify "Open Voting" for the round, which means you do not have to upload a party list and you will not have to change the party. All PNMs will show as Party 1. The chapter can have a combination of Party and Open Voting rounds during recruitment.