12 C.F.R. § 25.28
(b) Lending, investment, and service tests. The appropriate Federal banking agency assigns a rating for a bank or savings association assessed under the lending, investment, and service tests in accordance with the following principles:
(c) Effect of evidence of discriminatory or other illegal credit practices.
(1) The appropriate Federal banking agency 's evaluation of a bank's or savings association's CRA performance is adversely affected by evidence of discriminatory or other illegal credit practices in any geography by the bank or savings association or in any assessment area by any affiliate whose loans have been considered as part of the bank's or savings association's lending performance. In connection with any type of lending activity described in § 25.22(a), evidence of discriminatory or other credit practices that violate an applicable law, rule, or regulation includes, but is not limited to: