The Code gives the EPC authority to regulate traditional areas of environmental concern, such as solid waste and underground storage tanks, toxic and hazardous substance control, and water quality. The Code reserves Article 9 for Historical
 and Cultural Preservation.

The EPC is responsible for reviewing the Environmental Code and recommending changes to the Cherokee Nation Tribal Council. (63 CNCA §101(D)1). The purpose of the Environmental Code is to  “promote efforts which will prevent or eliminate damage to natural resources and the environment and to enrich the understanding of the ecological systems and natural resources important to the Cherokee Nation.” (63 CNCA §301)

Other powers and duties of the EPC include the promulgation of rules, enforcement actions, permit issuance, approval of facility plans, oversight of environmental review activities and procedures for handling complaints. Cherokee Nation employees who work in the Environmental Programs and the Office of the Secretary of Natural Resources provide assistance to the EPC.