29 C.F.R. § 38.11
In providing any aid, benefit, service, or training under a WIOA Title I-financially assisted program or activity, a recipient must not directly or through contractual, licensing, or other arrangements, discriminate on the basis of citizenship status. Individuals protected under this section include citizens and nationals of the United States, lawfully admitted permanent resident aliens, refugees, asylees, and parolees, and other immigrants authorized by the Secretary of Homeland Security or the Secretary's designee to work in the United States. Citizenship discrimination occurs when a recipient maintains and enforces policies and procedures that have the purpose or effect of discriminating against individual beneficiaries, applicants, and participants, on the basis of their status as citizens or nationals of the United States, lawfully admitted permanent resident aliens, refugees, asylees, and parolees, or other immigrants authorized by the Secretary of Homeland Security or the Secretary's designee to work in the United States.
29 C.F.R. §38.11