(a) Interference with rights
(1) Exercise of rights
It shall be unlawful for any employer to interfere with, restrain, or deny the exercise of or the attempt to exercise, any right provided under this subchapter.
(2) Discrimination
It shall be unlawful for any employer to discharge or in any other manner discriminate against any individual for opposing any practice made unlawful by this subchapter.
(b) Interference with proceedings or inquiriesIt shall be unlawful for any person to discharge or in any other manner discriminate against any individual because such individual—
(1)
has filed any charge, or has instituted or caused to be instituted any proceeding, under or related to this subchapter;