Yes. If USCIS intends to approve your NACARA application, you will be asked to sign a document in which you admit that you do not have legal status in the United States. This is necessary because USCIS cannot approve your NACARA application until USCIS has determined that you do not have legal status in the United States. Once you sign this admission document, USCIS will grant you lawful permanent resident status.
National Customer Service Center 1-800-375-5283 TDD for the Hearing Impaired 1-800-767-1833