noun
single-rate tariff system
Economic term referring to a tariff structure where a single rate is applied uniformly, as opposed to multiple or differentiated rates.
一本建税率は、輸入品に一律の関税を課す制度です。
A single-rate tariff system is a system that imposes a uniform duty on imported goods.
Compound of 一本建て (single standard) and 税率 (tax rate). The exact historical derivation is uncertain; the term is used in economic contexts.