What is meant by “Rule of Origin” in customs?

The "Rule of Origin" refers specifically to the criteria or guidelines used to determine the nationality of a product, which is crucial for interpreting tariff classifications and assessing duty obligations. This rule is necessary because countries impose different rates of duty on imports based on where the goods are produced. Understanding the origin of a product helps customs authorities decide the appropriate tariffs that apply, and it also impacts trade agreements and preferential duty treatment under various trade laws. Therefore, the correct answer highlights the significance of establishing a product's origin in customs procedures.

The other options touch upon related customs processes but do not pinpoint the essence of "Rule of Origin." For instance, guidelines for applying surcharges or calculating duties relate to financial aspects of customs operations, while verifying the safety of goods pertains to health and safety regulations, rather than the classification of goods based on their origin.