49 CFR § 26.43
Can recipients use set-asides or quotas as part of this program?
November 18, 2020
(a) You are not permitted to use quotas for DBEs on DOT-assisted contracts subject to this part.
(b) You may not set-aside contracts for DBEs on DOT-assisted contracts subject to this part, except that, in limited and extreme circumstances, you may use set-asides when no other method could be reasonably expected to redress egregious instances of discrimination.