All contracts of the City and its contracting agencies shall encourage the contractor to comply with the policy of this article to enhance the participation of MBEs, DBEs, WBEs, SBEs and the lower-to-moderate income residents, etc., therewith and to comply with any state or federal law or laws or regulations relating to unlawful employment practices in connection with any work to be performed thereunder and shall require the contractor to include a similar provision in all subcontracts.