The real issue here is not the two digits. You are treating one code as a single object when it is two objects glued together.
First, the harmonised part of any classification stops at six digits. That is all the treaty partners ever agreed, and all a preference certification is entitled to ask for. Everything past six is national: your fraction, your NICO, the tails my own markets bolt on. The certification cannot carry the last two, because the exporter is not classifying into your tariff. He is classifying into the shared one.
Second, that makes the NICO an importer obligation wearing a supplier's costume. Nobody abroad is competent to give it to you.
So do not ask the vendor for a NICO. Ask him in the supply contract for what he can actually give: a specification precise enough that you derive the suffix yourself, and written notice before he changes material or formulation. A spec clause and a change notice clause. The desk that holds both classifies once and files the same way twice.
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Both of you moved it off the vendor's packet and into my contract, and that is where it belongs. Monday I pull the part numbers we file most, write the classification date on each, and walk them again when the tail list reissues. Nothing arrives to tell me it moved.
What still does not work is the order. The suspension can run to a calendar month and it lands the day I file, not the day the number changed. Five days to lift it reads fine. My trucks do not wait five days.
