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handle is hein.crs/goveglg0001 and id is 1 raw text is: Congressional Research Service
Inforrninglih legiative debate sice 1914
U.S. Tariff Policy: Overview

Updated January 6, 2022

Introduction
A tariff is a customs duty levied on imported and exported
goods and services. Historically, countries used tariffs as a
primary means of collecting revenue. Today, other taxes
account for most government revenue in developed
countries. Tariffs are now typically used to protect domestic
industries or as leverage in trade negotiations and disputes.
The U.S. Constitution empowers Congress to set tariffs, a
power that Congress has partially delegated to the
President. The United States is also a member of the World
Trade Organization (WTO) and a party to a number of trade
agreements, which include specific tariff-related
commitments. Congress and the President thus create U.S.
tariff policy within the context of a rules-based global
trading system.
Rules-Based Global Trading System
The rules-based global trading system was established
following World War II. It began as the General Agreement
on Tariffs and Trade (GATT), which was later integrated
into a larger set of agreements establishing the WTO. This
system has aimed to reduce trade barriers and prevent trade
wars by establishing rules for the use of tariff and nontariff
barriers to trade. Among this system's core rules with
regard to tariffs are
 Nondiscrimination. Under the most-favored nation
(MFN) rule, a country must extend any trade
concession, such as a reduced tariff rate, granted to one
country member to all other WTO members. There are
exceptions, such as preferential rates for FTAs, special
treatment for developing countries, and WTO-allowed
responses to unfair trading practices.
 Binding Commitments. Through multilateral
negotiations, countries bind themselves to ceilings on
tariff rates for specific imports. That ceiling is called the
bound rate, which can be higher than actual applied
rates. Lowering bound rates has been a general goal of
each of the multilateral negotiations.
 Transparency. The WTO requires members to publish
and report their tariff rates and other trade regulations.
 Safety Valves. The WTO agreements permit members
to raise tariffs to address unfair trade practices and to
allow domestic industries to adjust to sudden surges in
imports in some circumstances.
Following the establishment of the GATT in 1947 and the
WTO in 1995, global tariff rates declined significantly,
spurring trade and opening markets for U.S. exports. Since
the establishment of the WTO, the value of exports of U.S.
goods have increased more than 160% adjusted for
inflation.

Figure 1. Weighted Average Applied Tariff Rates

Source: World Bank.
Notes: Weighted average of applied tariff rates globally and among
the five largest economies by GDP. Gaps indicate missing data. 2019
is the most recent year with fully comparable data. Europe refers to
the European Union.
U.S. Tariff Policy
Who Makes US. Tariff Policy?
The Constitution grants the power to lay and collect duties
and to regulate commerce with foreign nations to Congress.
The Constitution grants the authority to negotiate
international agreements to the President. Since tariffs are
no longer a primary source of revenue, they have
increasingly become an instrument of U.S. international
trade and foreign policy. As such, Congress now works
with the President to set tariff policy by granting authority
to negotiate trade agreements and to adjust tariffs in certain
other circumstances.
Presidential Trade Promotion Authority (TPA). Prior to
the 1930s, Congress usually set tariff rates itself. As U.S.
and global tariff rates increased during the Great
Depression, U.S. exports decreased. Congress responded by
authorizing the President to negotiate reciprocal trade
agreements that reduced tariffs through proclamation
authority up to a pre-set boundary. Hence, such an
agreement could enter into force without further
implementing legislation. However, nontariff barriers to
trade (such as discriminatory technical standards) became a
greater focus of trade negotiations in the late 1960s. As a
result, it became difficult to predict the substance of the
negotiations and authorize changes to existing U.S. laws by
proclamation before the negotiations took place. Congress
addressed this challenge in 1974 by establishing expedited
procedures to implement more complicated future trade
agreements. Under these procedures, currently known as
Trade Promotion Authority (TPA), Congress establishes

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