Do not assume every transaction follows the same path
DUIMP, LPCO, LI and DI can coexist during the transition. The official schedule identifies when specific operations stop using DI and where exceptions or system limitations remain.
Check before contracting and before shipping
Use the official simulator and schedule to cross-check NCM, transport mode, administrative treatment, customs regime and transaction details. Recheck if the product, route or timing changes.
Document a fallback plan
Record the flow checked, the date, required documents and the owner of each response to a request. This helps reduce surprises, but does not replace authority review or account for system changes.
Introductory guides to international trade processes, risks and decisions. Content is not a substitute for operation-specific technical, legal, tax or customs advice.