Indian Customs EDI requires electronic three part IGM filing, system approval, and Dy. Commissioner authorised amendments. The ICES pilot at Mumbai mandates electronic filing of the Import General Manifest (IGM) in three parts (vessel, cargo, container) as prior or final IGM; system generates IGM numbers after checklist confirmation. Arrival entry inwards are recorded by Preventive Officers, after which supplementary additions, amendments or deletions require written requests to and approval by the Dy. Commissioner (Imports) and are processed in the service centre and ICES. Immutable fields, deletion/addition procedures, amendment numbering, cancellation rules and restrictions once a Bill of Entry is filed are specified.