Wash. Rev. Code ch. 36.09
New county—Liability for debts.
36.09.010Debts and property to be apportioned.36.09.020Procedure to settle amount charged new county—Basis of apportionment.36.09.035Procedure to settle amount charged new county—Disagreement between auditors—Determination by third person.36.09.040Payment of indebtedness—Transfer of property.36.09.050Collection of taxes levied—Apportionment.