; (2) has testified or is about to testify in any proceeding described in paragraph (1); or (3) has assisted or participated or is about to assist or participate in any manner in— (A) any proceeding described in paragraph (1); or (B) any other action to carry out the purposes of this Act. (b) Remedy (1) Filing of complaint Any employee who believes that the employee has been discharged or otherwise discriminated against by any person in violation of subsection (a) may, not later than 30 days after the date on which the alleged violation occurs, file (or have any person file on behalf of the employee) a complaint with the Secretary of Labor (referred to in this section as the Secretary ) alleging that discharge or discrimination. (2) Notification On receipt of a complaint filed under paragraph (1), the Secretary shall notify the person named in the complaint of the filing of the complaint. (3) Investigations (A) In general On receipt of a complaint filed under paragraph (1), the Secretary shall conduct an investigation of the violation alleged in the complaint. (B) Results Not later than 30 days after the date on which the Secretary receives a complaint filed under paragraph (1), the Secretary shall— (i) complete the investigation under subparagraph (A); and (ii) notify in writing the complainant (and any person acting on behalf of the complainant) and the person alleged to have committed the applicable violation of the results of that investigation. (4) Orders (A) In general Not later than 90 days after the date on which the Secretary receives a complaint filed under paragraph (1), unless the proceeding on the complaint is terminated by the Secretary on the basis of a settlement entered into by the Secretary and the person alleged to have committed the applicable violation, the Secretary shall issue an order— (i) providing the relief described in paragraph (5)