Reuters reports that in a meeting with nearly 60 representatives from automakers, China is no longer allowing carmakers to test and improve their ADAS via remote software updates for vehicles already delivered to customers without approval. Carmakers are now required to carry out enough tests to verify reliability and to obtain approval from the authorities before such roll-outs.

Additionally, carmakers will no longer be able to offer unsupervised autonomous driving features, such as automated valet parking, one-touch summoning and remote parking. The idea is that because carmakers cannot ensure driver engagement and operational safety, “these functions will not be approved for products.”

Driver monitoring systems cannot be disabled under the new ruling too.

Finally, carmakers cannot use the terms such as “autonomous driving” and “intelligent driving” in marketing. Instead, they are now required to use “L(number) assisted driving,” referring to SAE’s levels of semi and full autonomy, and to strictly adhere to those classifications.

The regulatory move comes as automakers have been rushing to launch new models equipped with ADAS.

The decision to tighten the regulations happened after an accident involving a Xiaomi SU7. The vehicle, driving in autonomous mode, crashed and left three people dead.

The incident occurred last March on the Dezhou-Shangrao Highway in Anhui Province, China. Initial reports claimed the vehicle caught fire after a collision, with allegations that the “doors could not be unlocked, preventing escape.”

According to Xiaomi’s statement, the vehicle—a standard version SU7—was traveling at 116 km/h in NOA (Navigation on Autopilot) intelligent driving assistance mode when it approached a construction zone. The lane was closed with barriers, diverting traffic to the opposite lane. The system detected the obstacle, issued an alert, and began decelerating. The driver then took manual control, continued braking and steering, but ultimately collided with a concrete barrier post at an estimated 97 km/h speed. As for the doors, Xiaomi says that all four doors are equipped with mechanical emergency release handles located in the storage compartment area of each door panel. These handles function mechanically and can open the doors even if the battery is damaged.

Despite the findings, which seems to pin blame on the driver, the new regulation puts an end to tactics such as Xiaomi employing a 1,000-strong “experience team” (customers with early access to features) to test its autonomous driving features.