BEIJING, April 28 (Xinhua) -- Overseas NGOs will have to get approval from Chinese authorities before they operate on the Chinese mainland, under a law adopted by China's top legislature on Thursday.

This applies whether they are planning to open permanent offices or just operate here temporarily, according to the law, adopted through a vote at the bi-monthly session of the National People's Congress (NPC) Standing Committee.

The Ministry of Public Security and provincial police departments will be responsible for the registration and regulation. Foreign NGOs operating in China without approval will be punished.

The law states that governments at all levels must accommodate legal operation of overseas NGOs, providing policy consultation and guidance.

The law was aimed at regulating the activities of overseas NGOs in China, protecting their legal rights and interests, and promoting exchanges and cooperation.