; (2) a change in the status of a road as open or closed; or (3) a change in road densities. 9. Vacant grazing allotments made available to certain grazing permit holders (a) In general The Secretary concerned shall, to the maximum extent practicable, make vacant grazing allotments available to a holder of a grazing permit or lease issued by such Secretary if the such Secretary determines that the lands covered by such permit or lease are unusable because of— (1) a natural disaster (including a drought or wildfire); (2) court-issued injunction