[1] The subject heading incorporates references from non-preferred forms of the term including Aliens--Legal status, laws, etc.
[2] In 2010, racial justice organization Race Forward debuted a campaign to "Drop the I-Word," an effort to ask media sources to no longer use the word "illegal" when referring to undocumented immigrants, arguing that using the word to describe people was dehumanizing, racially charged, and legally inaccurate.
[6] Together with Dartmouth librarians, the students from CoFIRED submitted a formal request to the Library of Congress in the summer of 2014 for the heading to be revised to Undocumented immigrants.
[1] In February 2015, the Library of Congress announced it would not change the heading, in part because resources such as Black's Law Dictionary used "Illegal aliens" as an established term.
[10] In June 2016, the House of Representatives added a provision to the 2017 appropriations bill for the legislative branch requiring the Library of Congress to retain the heading without revision.