Yosef Karo, Translation:Shulchan Aruch — Orach Chaim 17…
“ This means we do not have to buy him a tallit in order that he be required to wear tzitzit as we see in Chapter 19 it says when he has a shawl with four corners he should wear it. The requirement for a tumtum and an androgynous is doubtful and so they should wrap without a blessing (Explanation: a tumtum does not know whether he/she is male/female, and an androgynous has both male and female genitals) . ”
