Idaho Code § 67-4312
The permits for the waters described in this act shall be issued upon the determination by the director of the department of water resources of the historical water flow and he shall issue a permit for only that amount. Any future appropriation of the waters specifically described in this act that are granted above the flow limits set by the director shall not involve any diversion that shall detract from or interfere with the geological interpretive value, historical significance, or the scenic attraction for public use under the administration of the park and recreation board of the stream from the natural high water mark on one (1) bank to the natural high water mark on the opposite bank, or of the springs specifically described as they arise upon the lands listed in this act.
The park and recreation board shall apply first for those permits for water arising upon land which, at the time of enactment, the board administers, controls, or owns.
Idaho Code § 67-4312