### Question
How is the term helium defined?


### Answer
The term **helium** is defined in *50 U.S.C. § 167c* as the following:

> helium, after extraction from helium-bearing natural gas or helium-gas mixtures, in a refined or semirefined state suitable for use.

#### Citation:
  - *50 U.S.C. § 167c*
  - Heading: **CHAPTER 10-HELIUM GAS**

