### Question
How is the "surge" defined?


### Answer
The term **surge** is defined in *19 U.S.C. § 3372* as follows -

> a significant increase in imports over the trend for a recent representative base period

#### Citation:
  - *19 U.S.C. § 3372*
  - Heading: **CHAPTER 21-NORTH AMERICAN FREE TRADE > SUBCHAPTER III-APPLICATION OF AGREEMENT TO SECTORS AND SERVICES > Part A-Safeguards > subpart 2-relief from imports from all countries**

