ákvæðistollur
Ákvæðistollur, often translated as a specific duty or specific tariff, is a type of import duty where the tax is levied based on a fixed amount per unit of the imported good. This is in contrast to ad valorem duties, which are calculated as a percentage of the value of the imported good. For example, an ákvæðistollur on imported coffee might be a set amount per kilogram, regardless of the price of the coffee.
The primary characteristic of an ákvæðistollur is its direct relationship to the quantity or physical measurement