An immigration-law concept defining a benefit, status, limitation, or procedural mechanism used in immigration adjudication. It applies when specified eligibility criteria and procedural steps are satisfied and produces defined administrative consequences. It does not apply when required criteria are not met or when disqualifying conditions bar the requested action. It materially affects lawful presence, authorization to work or travel, and exposure to enforcement outcomes. The concept is generally stable, though statutory, regulatory, and administrative practices may evolve over time.