34 C.F.R. § 84.640
(a) Employee means the employee of a recipient directly engaged in the performance of work under the award, including—
(b) This definition does not include workers not on the payroll of the recipient (e.g., volunteers, even if used to meet a matching requirement; consultants or independent contractors not on the payroll; or employees of subrecipients or subcontractors in covered workplaces).
(Authority: E.O.s 12549 and 12689; 20 U.S.C. 1082, 1094, 1221e-3 and 3474; and Sec. 2455, Pub. L. 103-355, 108 Stat. 3243 at 3327)