It's not. And as a person of color, I'll tell you that laws preventing discrimination offered me and my family zero protections (specifically with respect to restaurants) in the post CRA-III era.
I would assume that is Title III of the Civil Rights Act which covers the obligation of the Attorney General to instigate civil suites to enforce the CRA on behalf of complainants who do not have the means to pursue a civil suite on their own.
Sorry for the ambiguity. It's the third civil rights act (1964) after 57 and 60. I and II dominantly were about racism in voting, but III has substantial portions that were about regulating private behavior in addition to those segments about the state sponsored racism.