(1) These rules shall apply to both surface and groundwaters of the state.

(2) Because of changing future conditions, including institutional arrangements, reservations under this chapter will be for specific geographic areas rather than for particular water suppliers.

(3) Appropriation of reserved water shall be in accordance with the intent and procedures set forth in chapters 90.03 and 90.44 RCW and adopted water resources programs under chapters 173-500 through 173-562 WAC applicable to the geographic area specified in a water right application.

(4) Regulations reserving waters for public water supply shall, where appropriate, provide guidelines for an interim use of the reserved waters for other beneficial uses.