這是移民法關於waiver的規定，隻有謀殺和酷刑等少數情況不能waiver

No waiver shall be provided under this subsection in the case of an alien who has been convicted of (or who has admitted committing acts that constitute) murder or criminal acts involving torture, or an attempt or conspiracy to commit murder or a criminal act involving torture. No waiver shall be granted under this subsection in the case of an alien who has previously been admitted to the United States as an alien lawfully admitted for permanent residence if either since the date of such admission the alien has been convicted of an aggravated felony or the alien has not lawfully resided continuously in the United States for a period of not less than 7 years immediately preceding the date of initiation of proceedings to remove the alien from the United States. No court shall have jurisdiction to review a decision of the Attorney General to grant or deny a waiver under this subsection. 26/


(i)(1) The Attorney General may, in the discretion of the Attorney General, waive the application of clause (i) of subsection (a)(6)(C) in the case of an immigrant who is the spouse, son, or daughter of a United States citizen or of an alien lawfully admitted for permanent residence, if it is established to the satisfaction of the Attorney General that the refusal of admission to the United States of such immigrant alien would result in extreme hardship to the citizen or lawfully resident spouse or parent of such an alien 25b/ or, in the case of an alien granted classification under clause (iii) or (iv) of section 204(a)(1)(A) or clause (ii) or (iii) of section 204(a)(1)(B), the alien demonstrates extreme hardship to the alien or the alien's United States citizen, lawful permanent resident, or qualified alien parent or child.