25 CFR §273.174

1. (a)Any contract made with a State, public school district, or Indian corporation for the benefit of Indian students must require that the contractor, to the greatest extent feasible:
   1. (1)Give preference in and opportunities for employment and training to Indians in connection with the administration of such contract(s); and
   2. (2)Give preference in the award of subcontracts to Indian organizations and Indian-owned economic enterprises.
2. (b)All subcontractors employed by the contractor must, to the extent possible, give preference to Indians for employment and training and must include in their bid submission a plan to achieve maximum use of Indian personnel.