Notwithstanding the limitation of dollar rates contained in RCW
52.16.130, the board of fire commissioners of any district may levy, in addition to any levy for the payment of the principal and interest of outstanding general obligation bonds, an ad valorem tax on all property located in the district of not to exceed fifty cents per thousand dollars of assessed value and which will not cause the combined levies to exceed the constitutional or statutory limitations, and the additional levy, or any portion of the levy, may also be made when dollar rates of other taxing units are released by agreement with the other taxing units from their authorized levies.