(a) Evaluation
The Secretary shall conduct continuing evaluations of potential loss or shifts of employment which may result from any prohibition under this chapter, including, if appropriate, investigating threatened plant closures or reductions in employment allegedly resulting from such prohibition. The results of such evaluations and each investigation shall promptly be made available to the public.

(b) Investigation and hearings
On a written request filed with the Secretary by or on behalf of any employee who is discharged or laid off, threatened with discharge or layoff, or otherwise discriminated against, by any person because of the alleged effects of any such prohibition, the Secretary shall investigate the matter and, at the request of any party, shall hold public hearings, after not less than 30 days notice, at which the Secretary shall require the parties, including any employer involved, to present information on the actual or potential effect of such prohibition on employment and on any alleged employee discharge, layoff, or other discrimination relating to prohibitions and the detailed reasons or justification therefor. At the completion of such investigation, the Secretary shall make findings of fact as to the effect of such prohibition on employment and on the alleged employee discharge, layoff, or discrimination and shall make such recommendations as he deems appropriate. Such report, findings, and recommendations shall be available to the public. The Secretary of Labor shall participate in each such investigation.

(c) Rule of construction
Nothing in this section shall be construed to require or authorize the Secretary to modify or withdraw any prohibition under this chapter.