; and (2) if the Trade Representative and the Secretary do not plan to investigate the matter, explaining why not. (b) Matters To be included A request under subsection (a) shall include, at a minimum, a description of the covered labor matter requested to be investigated under that subsection and any related documentary evidence. (c) Manner of request A request may be made under subsection (a) by— (1) a notification to the United States Trade Representative, the Secretary of Labor, the Committee on Finance of the Senate, and the Committee on Ways and Means of the House of Representatives following a majority vote of the members of the Labor Advisory Committee for Trade Negotiations and Trade Policy or their designees; or (2) a signed letter by the majority of the members of the Labor Advisory Committee for Trade Negotiations and Trade Policy or their designees to the United States Trade Representative, the Secretary of Labor, the Committee on Finance of the Senate, and the Committee on Ways and Means of the House of Representatives. (d) Action in connection with request If the United States Trade Representative and the Secretary of Labor decide to investigate a covered labor matter after the receipt of a request under subsection (a), the Trade Representative and the Secretary shall— (1) not later than 120 days after receiving the request, conclude the investigation; and (2) not later than 90 days after concluding the investigation, submit to the Labor Advisory Committee for Trade Negotiations and Trade Policy, the Committee on Finance of the Senate, and the Committee on Ways and Means of the House of Representatives a report— (A) indicating whether the Trade Representative intends to pursue dispute resolution consultations with Mexico with respect to the matter