49 C.F.R. § 29.509
(a) Property management system. A Tribe must maintain a property management system to account for all property acquired with funds included in a funding agreement, acquired with Federal funds awarded by the Department or the Department of the Interior, or obtained as excess or surplus Federal property to be used for activities under the Program. The property management system must address the use, care, maintenance, and disposition of such property as follows:
(c) Tracking requirements under a property management system. The property management system of a Tribe relating to property used under the Program must track:
(e) Internal controls. The property management system must maintain effective internal controls that include, at a minimum, procedures for a Tribe to: