28 CFR §35.202

1. (a)A public entity may use conforming alternate versions of web content, as defined by WCAG 2.1, to comply with § 35.200 only where it is not possible to make web content directly accessible due to technical or legal limitations.
2. (b)WCAG 2.1 is incorporated by reference into this section with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. All material approved for incorporation by reference is available for inspection at the U.S. Department of Justice and at NARA. Contact the U.S. Department of Justice at: Disability Rights Section, Civil Rights Division, U.S. Department of Justice, 150 M St. NE, 9th Floor, Washington, DC 20002; ADA Information Line: (800) 514-0301 (voice) or 1-833-610-1264 (TTY); website: www.ada.gov [https://perma.cc/U2V5-78KW]. For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations.html [https://perma.cc/9SJ7-D7XZ] or email fr.inspection@nara.gov. The material may be obtained from W3C WAI, 401 Edgewater Place, Suite 600, Wakefield, MA 01880; phone: (339) 273-2711; email: contact@w3.org; website: https://www.w3.org/TR/2018/REC-WCAG21-20180605/ and https://perma.cc/UB8A-GG2F.