Fekko yes exactly - I think people are supposed to declare sincerely that the change will be permanent but logically, if the premise that you can quite reasonably change genders exists in the first place, then I don't think they could reasonably stop a person from wanting to change back... especially if it is demedicalised and de-supervised with Self-ID.
And if the TIM isn't actually required to wear dresses, make-up, wigs, take hormones, have surgery etc, etc anyway, then a TIM could remain a woman legally, but to all intents and purposes 'live as a man' and really we women couldn't stop them still claiming to be a woman because we would be told we were being sexist/gender stereotyping to say that you are only a woman if you shave and wear dresses and look like a woman etc. (??!!!??)
So really once a person/ TIM has declared themselves a woman then they really do have access to pretty much everything. Eg a Daniel Muscato with a gender neutral name like Jamie, would not be turned away from a men-only club (that didn't require gendered ID, eg a utility bill or something that would give away their legal status) because to anyone who didn't know him, he looks just like a man and would be assumed to be one.
So TIMs who don't pass or make an effort to pass really can have their cake and eat it.
it is qutie terrifying when you follow it all through :(