Customs EDI migration centralises document numbering and electronic duty payments, requiring prior submission of pending documents before system cutover. Deployment of ICES 1.5 at ICD Mulund shifts EDI operations to a central National Data Centre, requiring submission of all pending Service Centre entries before cutover; local document and cash queue data will not be migrated. Centralised document numbering will replace local continuous series, duty payment challans will be exchanged electronically with the Bank of India, DEPB debits will use a common central ledger for EDI locations, and certain printouts will be issued by designated customs officers instead of Service Centre operators.