8 C.F.R. § 246.1
If it appears to a district director that a person residing in his or her district was not in fact eligible for the adjustment of status made in his or her case, or it appears to an asylum office director that a person granted adjustment of status by an asylum officer pursuant to 8 CFR 240.70 was not in fact eligible for adjustment of status, a proceeding shall be commenced by the personal service upon such person of a notice of intent to rescind, which shall inform him or her of the allegations upon which it is intended to rescind the adjustment of his or her status. In such a proceeding the person shall be known as the respondent. The notice shall also inform the respondent that he or she may submit, within thirty days from the date of service of the notice, an answer in writing under oath setting forth reasons why such rescission shall not be made, and that he or she may, within such period, request a hearing before an immigration judge in support of, or in lieu of, his or her written answer. The respondent shall further be informed that he or she may have the assistance of or be represented by counsel or representative of his or her choice qualified under part 292 of this chapter, at no expense to the Government, in the preparation of his or her answer or in connection with his or her hearing, and that he or she may present such evidence in his or her behalf as may be relevant to the rescission.
8 C.F.R. §246.1