Leash That Woman, Would Ya?

From that bastion of feminist thought that is Saudi Arabia comes news that the kingdom had created a policy where by the movements of the female chattel of that country...that would be all of them...are automatically reported to their male owners.  Anytime a woman crosses the Saudi border, a text is sent to "her man"; whether or not he requests such service.

The couple who alerted al-Sharif was travelling toegether (sic). As they did, the husband received a text message from immigration authorities informing him that his wife had left the international airport in Riyadh.

While details are sketchy, it sounds like the service is not opt-in. Since the husband in the couple above was surprised by the SMS, he didn't have to "sign up" to get the message.

It doesn't seem like the tracking is carried out using a tracking device on the person of the woman, at least. Instead, it seems that the immigration authorities simply text the "guardian male" on record when a woman leaves the country, manually.

In the article, someone sarcastically asks why they just don't install RFID chips in their women and be done with it.

Never give advice to oppressive regimes.  They don't understand sarcasm and just might do as you suggest.