42 C.F.R. § 457.380 Eligibility verification.
Title 42 - Public Health
(a) The State must establish procedures to ensure the integrity of the eligibility determination process. (b) A State may establish reasonable eligibility verification mechanisms to promote enrollment of eligible children and may permit applicants and enrollees to demonstrate that they meet eligibility requirements through self-declaration or affirmation except that a State may permit self-declaration of citizenship only if the State has effective, fair and non-discriminatory procedures to ensure the integrity of the application process in accordance with §457.320(c).
Title 42: Public Health
PART 457—ALLOTMENTS AND GRANTS TO STATES
Subpart C—State Plan Requirements: Eligibility, Screening, Applications, and Enrollment
§ 457.380 Eligibility verification.