Which section of the OSH Act prohibits employers from discriminating against workers for excercising their safety and health rights?

Section 11(c) provides in general that no person shall discharge or in any manner discriminate against any employee because such employee has filed any complaint or instituted or caused to be instituted any proceeding under or related to this Act or has testified or is about to testify in any such proceeding or because of the exercise by such employee on behalf of himself or others of any right afforded by this Act