### Question
How does the law define failure to enroll?


### Answer
Under *49 U.S.C. § 44903*, **failure to enroll** is defined as:

> the inability of an individual to enroll in a biometric identifier system due to an insufficiently distinctive biometric sample, the lack of a body part necessary to provide the biometric sample, a system design that makes it difficult to provide consistent biometric identifier information, or other factors

#### Citation:
  - *49 U.S.C. § 44903*
  - Heading: **SUBTITLE VII-AVIATION PROGRAMS > PART A-AIR COMMERCE AND SAFETY > subpart iii-safety > CHAPTER 449-SECURITY > SUBCHAPTER I-REQUIREMENTS**

