Any contract, subcontract, or subgrant awarded under an EPA grant by an Indian Tribe or Indian Intertribal Consortium shall require to the extent feasible:
(a) Preferences and opportunities for training and employment in connection with the administration of such contracts or grants shall be given to Indians as defined in the Indian Self Determination Act (25 U.S.C. 450b); and
(b) Preference in the award of subcontracts and subgrants in connection with the administration of such contracts or grants shall be given to Indian organizations and to Indian-owned economic enterprises as defined in section 3 of the Indian Financing Act of 1974 (88 Stat. 77) [25 U.S.C. 1452].