Sea Cargo Manifest and Transhipment Regulations require electronic declarations, API onboarding for SEZs, and stakeholder outreach for implementation. Import-export manifest messaging is implemented nationwide and stuffing messages are live; DG Systems will onboard SEZ units by API integration and operationalise remaining inland transhipment messages. All stakeholders must file accurate electronic declarations in the prescribed format during the transition period extended to 31 March 2026, while Chief Commissioners and DG Systems conduct weekly outreach and ensure wide publicity and reporting of implementation difficulties.