CTE stands for Consent to Establish. It is the first approval needed before starting any construction or machinery installation. PPCB checks if the location is suitable and whether the proposed activity will harm the environment. Once you get the CTE, you can start building your factory or unit.
CTO stands for Consent to Operate. It comes after CTE. You must apply for it before starting production or offering any service. PPCB checks whether your plant follows all the conditions set during the CTE. Only after getting CTO can you legally start operating.
Both approvals are time-bound and must be renewed on time. Units must follow all conditions, including installing pollution control systems, maintaining records, and disposing of waste as per guidelines.