Fans often say they find it helpful to have Kevin Standlee walk them through the rules, thus a link here to Kevin’s explanation of site selection voting which begins —
This year’s Worldcon has a Site Selection Frequently Asked Questions, but it’s apparently still ambiguous to some people based on a recent Twitter exchange. I’m going to try and explain it again, for the benefit of people who possibly have never voted on a Worldcon Site Selection before. Bias Alert: I am a director of the Montreal in 2017 bid committee’s parent non-profit corporation and am listed as one of their committee on the ballot.
In order to cast a ballot on the 2017 Worldcon, you must:
1.Be at least a Supporting Member of the 2015 Worldcon.
2.Pay the Advance Supporting Membership (ASM) fee for the 2017 Worldcon. This automatically makes you a Supporting member of the 2017 Worldcon no matter who wins the election.