### Question
How does the law define transmix?


### Answer
Under *26 U.S.C. § 4083*, **transmix** is defined as:

> a byproduct of refined products pipeline operations created by the mixing of different specification products during pipeline transportation

#### Citation:
  - *26 U.S.C. § 4083*
  - Heading: **Subtitle D-Miscellaneous Excise Taxes > CHAPTER 32-MANUFACTURERS EXCISE TAXES > Subchapter A-Automotive and Related Items > PART III-PETROLEUM PRODUCTS > Subpart A-Motor and Aviation Fuels**

