Saudi Arabian women are forbidden from leaving the country without permission from a male "guardian". And now, to make extra sure this law is enforced, a new system run by the immigration authorities alerts men via SMS when their charges cross the border.
Manal al-Sharif, a well-known Saudi women's rights activist, tweeted information about the new system last week when she was alerted by a holidaying (Saudi) couple. The surprised husband, who said he hadn't opted in for the alert, received a text to say his wife was passing through immigration.
Saudi Arabia uses a strict interpretation of Sharia, the moral code and religious law of Islam. According to Human Rights Watch, guardians have almost total control over a woman and can be a husband, father, brother, or son. All women regardless of age are required to have one, and guardians can approve or reject her travel, education, work, marriages, official business and healthcare.
Within Saudi Arabia, opinion on guardianship is mixed. Liberal activists reject the custom as demeaning, nothing less than a master-slave relationship. Women's rights campaigner Wajeha Al-Huwaidar has said of the practice:
"Ownership of the woman is passed from the father or the brother to another man, the husband. The woman is merely a piece of merchandise, which is passed over to someone else - her guardian. How do you recognise a maid or a slave? The decision making is out of her hands."