Specifications include, but are not limited to: A. The contractor and subcontractor will give preference in employment opportunities under this contract to qualified Indian applicants who can perform the work required regardless of race, color, creed, age, sex, religion, national origin, or tribal affiliation to the extent set out in the paragraphs below. B. The contractor and subcontractor will not use pre-employment standards, qualifications, criteria, or other personnel requirements as a barrier to Indian employment except when such criteria or standards are required by business necessity. The contractor and subcontractor have the burden of showing that such criteria or standards are required by business necessity.