China has drawn up new safety rules for the growing number of autonomous vehicles on its roads, including a mandatory deactivation override, the government said Tuesday. Buyers will also have to be informed of any limitations in autonomous systems. They will require that autonomous vehicles feature safe procedures to activate and deactivate automated driving, it said. Safety concerns and the cost of developing next-level systems have complicated progress in the introduction of of autonomous vehicles. The new rules follow a UN agency’s adoption in June of the first global regulations for fully autonomous vehicles, which China backed.