This is so stupid. How would they even enforce it? Are they going to check everyone’s chromosomes at each meeting?
Lots of trans women pass, and lots of cis lesbians can look a bit manly, so I can’t imagine any practical way to enforce it. And a rule without enforcement is pointless.
Lesbians are same sex attracted women by definition. Sex, not gender. Even if you consider trans women to be women, their sex is still male. This means that by definition they cannot ever be a lesbian.
A lot, lot less than you think. Close to zero.
Sex, not gender, based environments are absolutely necessary for society. Having them open to both sexes defeats the entire purpose of their existence.
How do you know if a trans woman is passing? You probably only notice the ones that don’t.
Because they never do.