In response to foreign criticism and women's rights activism, bin Salman has implemented modest reforms to improve women's rights in Saudi Arabia. In September 2017, he implemented the women to drive movement's multi-decade demand to lift the ban on female drivers.[138] He legislated against some elements of Saudi Arabia's Wali system, also a topic of a many decade long campaign by women's rights activists.[139] In response to the Saudi anti male-guardianship campaign,[140] the Saudi Government enacted a law that allows women above 21 years old to obtain passports and travel abroad without needing the permission of their male guardians.[141][142] In February 2018, it became legally possible for Saudi women to open their own business without a male's permission.[143] According to the Saudi Information Ministry, as of March 2018[update], mothers in Saudi Arabia became authorised to retain immediate custody of their children after divorce without having to file any lawsuits.[144]