; or (2) pay or collect a fee for use of a foreign or domestic corporation, partnership, limited liability corporation, or other entity. . (4) Protection from retaliation for being an employee; presumption of retaliation Section 3144a of title 40, United States Code, added by paragraph (3), is amended by adding at the end the following: (c) Retaliation (1) In general A contractor or subcontractor of a contract or subcontract to which this subchapter applies shall not discharge or in any other manner discriminate against a laborer or mechanic who is employed by the contractor or subcontractor and is performing any labor under the contract or subcontract, because— (A) such laborer or mechanic has filed any complaint or instituted or caused to be instituted any proceeding under or related to this subchapter, or has testified or is about to testify in any such proceeding, or has served or is about to serve on an industry committee; or (B) such laborer or mechanic— (i) is required, pursuant to the enactment of the Worker Flexibility and Small Business Protection Act of 2020 , to be classified as an employee of the contractor or subcontractor for purposes of this subchapter and not an independent contractor