要看你的大樓成分,有的地方每一個業主是一個股東,多少股份都在HOA有劃分。
https://www.argianas.com/blog/understanding-chicagos-condo-deconversion-process/
This link says IL states allows condo building sales when 75% vote yes.
This kind of law of super majority is to avoid the issue of "hold outs", 中文叫做釘子戶。