; and (ii) notify the complainant and the person alleged to have committed the violation of subsection (a), in writing, of such determination. (B) Notice of relief available If the Administrator concludes that there is reasonable cause to believe that a violation of subsection (a) has occurred, the Administrator shall, together with the notice under subparagraph (A)(ii), issue a preliminary order providing the relief prescribed by paragraph (4)(B). (C) Request for hearing Not later than 30 days after the date of receipt of notification of a determination of the Administrator under this paragraph, either the person alleged to have committed the violation or the complainant may file objections to the findings or preliminary order, or both, and request a hearing on the record. The filing of such objections shall not operate to stay any reinstatement remedy contained in the preliminary order. Any such hearing shall be conducted expeditiously, and if a hearing is not requested in such 30-day period, the preliminary order shall be deemed a final order that is not subject to judicial review. (3) Grounds for determination of complaints (A) In general The Administrator shall dismiss a complaint filed under this subsection, and shall not conduct an investigation otherwise required under paragraph (2), unless the complainant makes a prima facie showing that any behavior described in paragraphs (1) through (4) of subsection (a) was a contributing factor in the unfavorable personnel action alleged in the complaint. (B) Rebuttal evidence Notwithstanding a finding by the Administrator that the complainant has made the showing required under subparagraph (A), no investigation otherwise required under paragraph (2) shall be conducted, if the employer demonstrates, by clear and convincing evidence, that the employer would have taken the same unfavorable personnel action in the absence of that behavior. (C) Evidentiary standards The Administrator may determine that a violation of subsection (a) has occurred only if the complainant