Trouble is what does VA mean by single sex spaces? And when she says women, does she mean anyone who identifies as a woman or female people who need same sex only options?
Yes, it needs to be got right. Would be very easy to create a law that it will take a decade to sort out when it proves to be a disaster for a significant proportion of female people now paying taxes for spaces they themselves have no access to. Many due to their religion, culture, disability and other recognised socially important reasons not trumped by any other single characteristic.