; venue of certain proceedings (a) Preferences Section 547(b) of title 11, United States Code, is amended by inserting ‘‘, based on reasonable due diligence in the circumstances of the case and taking into account a party’s known or reasonably knowable affirmative defenses under subsection (c),’’ after may . (b) Venue of certain proceedings Section 1409(b) of title 28, United States Code, is amended by striking $10,000 and inserting $25,000 . 4. Conforming amendments (a) Title 11 Title 11, United States Code, is amended— (1) in section 101— (A) in paragraph (51C), by inserting and has not elected that subchapter V of chapter 11 of this title shall apply after is a small business debtor ; and (B) in paragraph (51D)— (i) in subparagraph (A)— (I) by striking or operating real property or activities incidental thereto and inserting single asset real estate ; and (II) by striking for a case in which and all that follows and inserting not less than 50 percent of which arose from the commercial or business activities of the debtor; and ; and (ii) in subparagraph (B)— (I) by striking the period at the end and inserting a semicolon; (II) by striking does not include any member and inserting the following: “does not include— (i) any member ; and (III) by adding at the end the following: (ii) any debtor that is a corporation subject to the reporting requirements under section 13 or 15(d) of the Securities Exchange Act of 1934 ( 15 U.S.C. 78m , 78o(d)); or (iii) any corporation that— (I) is subject to the reporting requirements under section 13 or 15(d) of the Securities Exchange Act of 1934 ( 15 U.S.C. 78m , 78o(d)); and (II) is an affiliate of a debtor. ; (2) in section 103— (A) by redesignating subsections (i) through (k) as subsections (j) through (l), respectively; and (B) by inserting after subsection (h) the following: (i) Subchapter V of chapter 11 of this title applies only in a case under chapter 11 in which a small business debtor elects that subchapter V of chapter 11 shall apply.