Form I-129, Petition for a Nonimmigrant Worker is a form submitted to the United States Citizenship and Immigration Services used by employers or prospective employers to obtain (or amend the details of) a worker on a nonimmigrant visa status. Form I-129 is used to either file for a new status or a change of status, such as new, continuing or changed employer or title; or an amendment to the original application. Approval of the form makes the worker eligible to start or continue working at the job (on or after the indicated start date) if already in the United States. If the worker is not already in the United States, an approved Form I-129 may be used to submit a visa application associated with that status. The form is 36 pages long (8 pages for the main form, and the remaining pages for various supplements not all of which may be applicable to every petition) and the instructions for the form are 29 pages long.[1] It is one of the many USCIS immigration forms.