1.Original 24 articles promulgated by Environmental Protection Administration order on February 4, 1998
2.Revisions to Articles 2, 3 and 23 promulgated by Environmental Protection Administration order on August 8, 1999
3.Revisions to Articles 12 through 14, 18 and 19 promulgated by Environmental Protection Administration order on April 9, 2003
4.Revisions to Article 18 and deletion of Articles 15, 16, 17, and 22 promulgated by Environmental Protection Administration order on August 7, 2006