45 C.F.R. § 90.15 Exceptions to the rules against age discrimination. Reasonable factors other than age.
Title 45 - Public Welfare
A recipient is permitted to take an action otherwise prohibited by §90.12 which is based on a factor other than age, even though that action may have a disproportionate effect on persons of different ages. An action may be based on a factor other than age only if the factor bears a direct and substantial relationship to the normal operation of the program or activity or to the achievement of a statutory objective.
Title 45: Public Welfare
PART 90—NONDISCRIMINATION ON THE BASIS OF AGE IN PROGRAMS OR ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE
Subpart B—What is Age Discrimination?
Standards for Determining Discriminatory Practices
§ 90.15 Exceptions to the rules against age discrimination. Reasonable factors other than age.