■ DENR DAO 96-37 and DAO 2003-30, otherwise known as the Revised Implementing Rules and Regulation of PD 1586 (Environmental Impact System)
■ PD 984 and related issuances such as DAO 35 (Revised Effluent Regulation of 1990) and DAO 34 (Revised Water Usage and Classification/Water Quality Criteria)
■ RA 6969 (Toxic Substances and Hazardous and Nuclear Wastes Control Act of 1990)
■ REPUBLIC ACT 8749 (Philippine Clean Air Act of 1999) and IRR
■ DENR ADMINISTRATIVE ORDER NO. 26-A Series 1994 (Philippine Standards For Drinking Water 1993 Under The Provision of Chapter II Section 9 of PD 856, otherwise known as the Code on Sanitation of the Philippines)
■ NWRB (Water Rights Permit)