### Question
What does Top-Screen mean?


### Answer
**Top-Screen** has the following meaning in *6 U.S.C. § 621*:

> given the term in section 27.105 of title 6, Code of Federal Regulations, or any successor thereto; 

#### Citation:
  - *6 U.S.C. § 621*
  - Heading: **CHAPTER 1-HOMELAND SECURITY ORGANIZATION > SUBCHAPTER XVI-CHEMICAL FACILITY ANTI-TERRORISM STANDARDS**

