MTF who is the AA sponsor?

With so many things taking an anomalous path, if there were a small community where there was only one AA chapter (or whatever they call them) and there was a MTF person there and everyone else is regular and straight, who would the sponsor be? Seeing, I guess, the rules (written or not) is that your sponsor be the same sex as person they are sponsoring. Seeing he/she would have grown or had acquired aftermarket melons, got liposuctioned, maybe butt implanted, laser hair removed, etc., but still has the sausage and most likely still officially male by the driver’s license, is the sponsor female, is it male, or to cover the bases they have to assign a male and female sponsor?