Searching that Title 8 returns hits on constructs such as "aliens who illegally" but NO hits on "illegal alien".
Undocumented aliens are not always illegally within the USofA, they have alien status and lack documentation. They may or may not have entered illegally, they may have applied for recognition and been passed in.
Title 8—Aliens and Nationality CHAPTER I—DEPARTMENT OF HOMELAND SECURITY SUBCHAPTER B—IMMIGRATION REGULATIONS PART 214—NONIMMIGRANT CLASSES
https://www.law.cornell.edu/cfr/text/8/214.2
makes NO use of the term "illegal alien"
Searching that Title 8 returns hits on constructs such as "aliens who illegally" but NO hits on "illegal alien".
Undocumented aliens are not always illegally within the USofA, they have alien status and lack documentation. They may or may not have entered illegally, they may have applied for recognition and been passed in.
See, also: https://www.aclu.org/wp-content/uploads/legal-documents/FINA...