Police in Hainan will be authorized to board and search ships that illegally enter the province's waters in 2013, the latest Chinese effort to protect the South China Sea.

Under a set of regulation revisions the Hainan People's Congress approved on Tuesday, provincial border police are authorized to board or seize foreign ships that illegally enter the province's waters and order them to change course or stop sailing.

The full texts of the regulations, which take effect on Jan 1, will soon be released to the public, said Huang Shunxiang, director of the congress's press office.