I have read that according to Hadhrat Ataa (rahmatullah alayh), even old women have to don jilbaab.

Answer

According to Hadhrat Ataa (rahmatullah alayh), the permission in the aayat for old hags and aunts beyond the age of attraction to cast off their outer-cloaks (jilbaabs) applies within their homes. Thus, according to this opinion the old aunt may remove her jilbaab within the home, but not when she leaves the home precincts. Although this is not the majority view, it nevertheless, is an authoritative opinion of a great authority. When even an old aunt emerges from her home, then according to Hadhrat Ataa, she must be clad fully in the same way as young women.