the general counsel shall make a determination as to whether or not there is probable cause to believe that a person has committed, or is about to commit, a violation of this Act or chapter 95 or chapter 96 of the Internal Revenue Code of 1986, and shall promptly submit such determination to the Commission, and shall include with the determination a brief stating the position of the general counsel on the legal and factual issues of the case. (B) At the time the general counsel submits to the Commission the determination under subparagraph (A), the general counsel shall simultaneously notify the respondent of such determination and the reasons therefore, shall provide the respondent with an opportunity to submit a brief within 30 days stating the position of the respondent on the legal and factual issues of the case and replying to the brief of the general counsel. The general counsel shall promptly submit such brief to the Commission upon receipt. (C) Upon the expiration of the 30-day period which begins on the date the general counsel submits the determination to the Commission under subparagraph (A) (or, if the respondent submits a brief under subparagraph (B), upon the expiration of the 30-day period which begins on the date the general counsel submits the respondent’s brief to the Commission under such subparagraph), the general counsel’s determination shall take effect, unless during such 30-day period the Commission, by vote of a majority of the members of the Commission who are serving at the time, overrules the general counsel’s determination. If the determination by the general counsel that there is probable cause to believe that a person has committed, or is about to commit, a violation of this Act or chapter 95 or chapter 96 of the Internal Revenue Code of 1986, or if the determination by the general counsel that there is not probable cause that a person has committed or is about to commit such a violation is overruled as provided under the previous sentence, for purposes of this subsection, the