; (II) ensuring compliance with the requirements of this chapter with regard to the service employee's performance of such labor; or (III) upholding the rights and protections of this chapter with regard to the service employee's performance of such labor; or (iv) based on an act or omission of the 2 or more persons, the service employee reasonably believed that such persons were the service employee's employers and the service employee did not have actual knowledge that any of the persons were not the service employee's employer under this chapter. . (h) Walsh-Healey Public Contracts Act Chapter 65 of title 41, United States Code, is amended by inserting after section 6501a the following: 6501b. Applicability to multiple employers and related entities (a) Multiple employers (1) Rule of interpretation This subsection— (A) is to be read as an addition to, and an augmentation and expansion of, all relevant judicial and agency interpretations in existence on the date of enactment of the Worker Flexibility and Small Business Protection Act of 2020 regarding which persons qualify as employers in relation to a given individual performing labor in the manufacture or furnishing of materials, supplies, articles, or equipment under a contract subject to this chapter, including in a multiple employer or joint employment structure; (B) shall not be interpreted by any court or agency as a restriction on, or narrowing of, any such interpretations