Every district officer or employee handling any district funds shall execute a surety bond payable to the district in the sum of double the estimated amount of funds handled monthly, conditioned that the principal will strictly account for all moneys or credit received by him or her for the use of the district. Each bond and the amount thereof shall be approved by the county legislative authority of the county within which the major portion of the district is situated, and thereafter filed with the secretary of the district.
RCW 86.09.304