1. Beijing Water Resources Sustainable Use Plan for the Early 21stCentury (2001) State Council of the People's Republic of China.
2. Comprehensive Standard of Sewage Drainage (1996) Ministry of Construction (Standard GB8978).
3. Contract Law (1999) National People's Congress of the People's Republic of China.
4. Details on Implementing Water Abstraction Permits (2006) Zhejiang Provincial Government.