of part A of title II, including as provided under section 415(d)(7) with respect to Members of the House of Representatives and Senators. (e) Standards for counsel providing representation Any counsel who represents a party in any of the procedures provided under this title shall have an obligation to ensure that, to the best of the counsel’s knowledge, information, and belief, as formed after an inquiry which is reasonable under the circumstances, each of the following is correct: (1) No pleading, written motion, or other paper is presented for any improper purpose, such as to harass, cause unnecessary delay, or needlessly increase the cost of resolution of the matter. (2) The claims, defenses, and other legal contentions the counsel advocates are warranted by existing law or by a nonfrivolous argument for extending, modifying, or reversing existing law or for establishing new law. (3) The factual contentions have evidentiary support or, if specifically so identified, will likely have evidentiary support after a reasonable opportunity for further investigation or discovery. (4) The denials of factual contentions are warranted on the evidence or, if specifically so identified, are reasonably based on belief or a lack of information. . (b) Conforming amendment relating to civil action Section 408 ( 2 U.S.C. 1408 ) is amended— (1) by striking section 404 and inserting section 401