BEIJING -?China is drafting a law on the proper way and place to sing its national anthem. Violators, including those who maliciously modify the lyrics, will face criminal prosecution or up to 15 days detention.

The draft legislation was given a second reading at the bimonthly session of the National People's Congress (NPC) Standing Committee, which opened Monday.

Lawmakers have made the anthem off-limits at funerals and other "improper" private occasions, in commercial advertisements or as background music at public places.

The song will only be allowed at formal political gatherings, including the opening and closing of NPC sessions, constitutional oath ceremonies, flag raising ceremonies, major celebrations, award ceremonies, commemorations, national memorial day events, important diplomatic occasions, major sport events and other proper occasions.

Despite the restrictions, the legislation encourages people to sing the anthem on proper occasions to express patriotism.

The law states that the song should be included in textbooks for students at primary and secondary schools.