25 CFR 170.205 - What is an IRR High Priority Project (IRRHPP)?
(a) The IRRHPP is a special funding pool that can be used:
(1) By a tribe whose annual allocation is insufficient to complete its highest priority project;
(2) By a governmental subdivision of a tribe that is authorized to administer the tribe's IRR Program funding and whose annual allocation is insufficient to complete its highest priority project; or
(3) By any tribe for an emergency/disaster on any IRR transportation facility.
(b) Eligible applicants may have only one IRRHPP application pending at any time. This includes emergency/disaster applications.
(c) IRRHPP funds cannot be used for transportation planning, research, routine maintenance activities, and items listed in § 170.116.