What additional documentation may an applicant need to provide if not a U.S. citizen?

If an applicant is not a U.S. citizen, providing documentation as a registered alien is essential to verify their legal status in the country. This documentation generally demonstrates that the individual has been granted permission to reside in the U.S. as a lawful permanent resident or has some form of legal presence. It ensures that the applicant meets any legal requirements required for various processes or services, such as obtaining a license or fulfilling certain obligations related to their application.

The requirement for documentation as a registered alien underscores the importance of establishing legal residency status, which is a critical factor in many regulatory and administrative contexts. Hence, this answer is the one that directly addresses the needs of someone who is not a U.S. citizen.