34 C.F.R. § 110.10
The rules stated in this section are subject to the exceptions contained in §§ 110.12 and 110.13 of these regulations.
(b) Specific rules. A recipient may not, in any program or activity receiving Federal financial assistance, directly or through contractual, licensing, or other arrangements, use age distinctions or take any other actions that have the effect, on the basis of age, of—
(c) Other forms of discrimination. The specific forms of age discrimination listed in paragraph (b) of this section do not necessarily constitute a complete list.
(Authority: 42 U.S.C. 6101-6103)