Please see google definition - complex and various meanings
Product as defined in The Products of Animal Origin
The document used can be, for instance, a T2L or another document accepted in the Union customs legislation, such as an invoice or shipping company's goods manifest. The document has to be endorsed by Customs.
Relates to the requirement that goods must be declared to customs prior to export.
An agreement between the EU and a non-EU country allows goods originating in that country to be imported at a preferential rate of duty. The quantity of goods allowed to be imported at preferential rates may be restricted by tariff quotas or ceilings.