Members of the Chicago City Council unanimously endorsed a plan Friday to extend the city’s program that earmarks a portion of city contracts for firms owned by Black, Latino and Asian Chicagoans as well as women for another six years, without expanding its scope.

City officials will have to move cautiously to extend the city’s program that earmarks a portion of city contracts for firms owned by Black, Latino and Asian Chicagoans as well as women in the face of hostile courts, officials warned the Chicago City Council.