Chinese authorities will begin revoking the travel privileges of those with low scores on its so-called “social credit system,” which ranks Chinese citizens based on comprehensive monitoring of their behavior. Those who fall afoul of the system could be blocked from rail and air travel for up to a year.
China’s National Development and Reform Commission released announcements on Friday saying that the restrictions could be triggered by a broad range of offenses. According to Reuters, those include acts from spreading false information about terrorism to using expired tickets or smoking on trains.
Get Data Sheet, Fortune’s technology newsletter.
The Chinese government publicized its plans to create a social credit system in 2014. There is some evidence that the government’s system is entwined with China’s private credit scoring systems, such as Alibaba’s Zhima Credit, which tracks users of the AliPay smartphone payment system. It evaluates not only individuals’ financial history (which has proven problematic enough in the U.S.), but consumption patterns, education, and even social connections.
A Wired report last year found that a user with a low Zhima Credit score had to pay more to rent a bicycle, hotel room, or even an umbrella. Zhima Credit’s CEO has said, in an eerie prefiguring of the new travel restrictions, that the system “will ensure that the bad people in society don’t have a place to go, while good people can move freely and without obstruction.”
Though the policy has only now become public, Reuters says it may have come into effect earlier — in a press conference last year, an official said 6.15 million Chinese citizens had already been blocked from air travel for social misdeeds.