What is a customs union and how does it facilitate cross-border trade?

• A. A monetary union where members use the same currency.
• B. A system of border checkpoints with uniform paperwork.
• C. A regional arrangement where member states adopt a common external tariff and remove internal barriers, simplifying trade.
• D. It is primarily a trade agreement for services.

Answer: (C)

A customs union is a regional arrangement where member states adopt a common external tariff and remove internal barriers to trade, making cross-border trade easier. By applying one tariff policy to goods arriving from outside the union and eliminating tariffs and many border checks between members, businesses can move products across member countries with lower costs, fewer delays, and more predictability. This creates a larger, integrated market, simplifies planning and sourcing, and reduces the friction that can come from differing national tariffs or procedures.

The other ideas don’t capture the core idea: a customs union is about tariff policy and removing internal trade barriers for goods, not about sharing a currency (monetary union), simply having uniform border paperwork without a common external tariff, or focusing mainly on services rather than goods.