; (2) by inserting (1) before It shall be unlawful ; and (3) by adding at the end the following new paragraph: (2) Any rules or regulations requiring a futures commission merchant to maintain a residual interest in accounts held for the benefit of customers in amounts at least sufficient to exceed the sum of all uncollected margin deficits of such customers shall provide that a futures commission merchant shall meet its residual interest requirement as of the end of each business day calculated as of the close of business on the previous business day. . (b) Conforming amendment Section 4d(h) of such Act ( 7 U.S.C. 6d(h) ) is amended by striking Notwithstanding subsection (a)(2) and inserting Notwithstanding subsection (a)(1)(B) . 105. Certainty for futures customers and market participants Section 20(a) of the Commodity Exchange Act ( 7 U.S.C. 24(a) ) is amended— (1) by striking and at the end of paragraph (4); (2) by striking the period at the end of paragraph (5) and inserting ; and