34 C.F.R. § 84.230
(a) You must identify all known workplaces under each ED award. A failure to do so is a violation of your drug-free workplace requirements. You may identify the workplaces—
(c) If you identified workplaces to the ED awarding official at the time of application or award, as described in paragraph (a)(1) of this section, and any workplace that you identified changes during the performance of the award, you must inform the ED awarding official.
(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)