To qualify as a contractor claiming disadvantaged or historically underutilized business status under this subchapter:
(1) the general contractor will perform all of the estimating and contract administration functions with the employees of that contractor;
(2) subcontractors will perform all of their work of their trade with their own employees or, if the subcontractor uses an employee leasing firm for the purpose of providing salary and benefit administration, with employees who in all other respects are supervised and perform on the job as if they were employees of the subcontractor; and
(3) a prime contractor who intends to subcontract specific trades may do so if:
(A) the dollar value of the subcontracts does not exceed 75 percent of the original value of the contract; and
(B) all work in the trade of the prime contractor is accomplished by employees of that contractor or, if the prime contractor uses an employee leasing firm for the purpose of salary and benefit administration, with employees who in all other respects are supervised and perform on the job as if they were employees of the prime contractor.