This article examines the adoption of voting methods designed to support individuals with intellectual disabilities in elections. It focuses on two widely used approaches, frequently explored in scholarly discourse: assisted voting and proxy voting. Both of these voting methods rely on third-party involvement and therefore require the consideration of the prohibition of plural voting in the Australian Constitution. The article concludes that while assisted voting and a limited form of proxy voting-where the proxy must strictly follow the elector’s explicit instructions-are constitutional, proxy voting becomes unconstitutional if the elector is unable to communicate their electoral judgment. Assisted voting therefore emerges as the most practical and constitutionally compliant option.