### Question
How is the term System unit defined?


### Answer
The term **System unit** is defined in *16 U.S.C. § 3502* as the following:

> any undeveloped coastal barrier, or combination of closely-related undeveloped coastal barriers, included within the John H. Chafee Coastal Barrier Resources System established by section 3503 of this title

#### Citation:
  - *16 U.S.C. § 3502*
  - Heading: **CHAPTER 55-COASTAL BARRIER RESOURCES**

