A special fund is created in the Treasury of Clallam County in which all taxes collected from the special excise tax herein levied shall be deposited. This fund shall only be used for the purpose of paying all or any part of the cost of tourism promotion, acquisition of tourism-related facilities, or operation of tourism-related facilities, or, under Chapter 39.34 RCW, may agree to the utilization of revenue from taxes imposed under this chapter for the purposes of funding a multijurisdictional tourism-related facility, and until withdrawn for use, the monies accumulated in such fund may be invested in interest-bearing securities by the County Treasurer in any manner authorized by law.