; (II) the preference or ability of the holder of the grazing permit or lease to return to the original allotment once access to, or the use of, the original allotment is restored; or (III) the animal unit months in future authorizations, or conditions of a permit, of the holder of the grazing permit or lease. (c) Duration The Secretary concerned shall determine the duration of the temporary use of a vacant grazing allotment made available pursuant to subsection (b), after considering the period of time necessary for the original allotment of the holder of the grazing permit or lease to return to use, not to exceed 3 consecutive grazing seasons. (d) Guidelines (1) In general Not later than 1 year after the date of enactment of this section, the Secretary concerned shall establish guidelines to expeditiously, efficiently, and effectively carry out activities authorized under this section. (2) Considerations In establishing the guidelines under paragraph (1), the Secretary concerned may consider— (A) eligibility criteria for the holders of grazing permits or leases; (B) prioritizing holders of grazing permits or leases in close proximity to a vacant grazing allotment; (C) any class or change in class of livestock on the temporary use of a vacant grazing allotment, with consideration given to local ecological conditions, disease, wildlife conflicts, and other factors based on localized conditions; (D) processes for coordinating with allotments adjoining or within the vicinity of a vacant grazing allotment; and (E) any other processes intended to expedite procedures for making vacant grazing allotments available during emergent circumstances. . 3. Public rangeland resiliency funds (a) Investment of amounts in the Land and Water Conservation Fund Section 200302 of title 54, United States Code, is amended— (1) by redesignating subsection (c) as subsection (d)