The change was notified on September 22, 2026, through an amendment to the Environment Impact Assessment (EIA) Notification, 2006. The move follows recommendations from expert appraisal committees that the earlier validity period was insufficient for projects with long gestation periods and phased development.    Under the amended framework, environmental clearances for eligible port and harbour projects will initially remain valid for 20 years. Projects can subsequently seek an extension of up to five years, subject to an assessment of existing environmental safeguards.    A further extension of up to five years may be considered in deserving cases where a project has still not become operational after the first extension. The Expert Appraisal Committee or State-level Expert Appraisal Committee may also recommend additional environmental safeguards for inclusion in the project’s Environmental Management Plan.    Previously, environmental clearances for ports and harbours were valid for 10 years, with only a one-year extension available. The revised framework is intended to address the lengthy development timelines associated with major maritime infrastructure, including projects built in multiple phases.    The longer validity period could provide greater regulatory certainty for developers undertaking port construction, expansion, modernisation, breakwater development and dredging activities. It may also reduce the need for projects facing delays to restart the environmental clearance process after the previous validity period expires.    The government has linked the change to the long gestation and phased development characteristics of port and harbour projects. The Ministry of Ports, Shipping and Waterways had also sought a longer validity period during consultations on the proposed amendment.    The revised rules are expected to support the development of long-term maritime infrastructure while retaining provisions for environmental safeguards through periodic reviews when extensions are sought.