CDS40074When subsidy AI code 'NIAID' is entered at item level in DE 2/2, either 'NIIMP' or 'NIDOM' AI codes must also be entered at item level on the same goods item

HMRC explanation

Relation error
You have not entered either 'NIIMP' or 'NIDOM' AI codes when you declared subsidy AI code 'NIAID'. Either of these codes are required to be entered at item level on the same good item.

Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence

What to check across the Domain and value errors

A code or value is not recognised, does not apply to the commodity, conflicts with a tariff measure or condition, or is duplicated. Check the code list for the element, the measures for the commodity code on the UK Trade Tariff, and any preference, unit or document code tied to those measures.

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Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence