This tax information and impact note details new legislation that will enable HMRC to grant Advance Valuation Rulings to customers importing goods into the UK. Advance Valuation Rulings are written decisions made by customs authorities at the request of a trader that are legally binding on both parties. They are a trade facilitation and are not mandatory. They will provide certainty to customers on how to arrive at the customs value for their goods. The customs value impacts the amount of duty that may be due. Advance Valuation Rulings will, in turn, assist customers in the completion of customs declarations.