Idaho Code § 43-2543
All money received by the treasurer on account of the payment of assessments or installments thereof, the assignment or redemption of delinquency certificates, or for rents, issues and profits, or from the sale of any property, title to which is held by the district for the benefit of any local improvement district, less any expenses of securing possession of said property, or for the care and operation and sale of the same, shall be deposited to the credit of the interest fund and bond fund of the local improvement district, in the same proportion as the assessment or installments for which the property was taken. Any money left in a local improvement district interest or bond fund or any money derived from the rental or sale of any real property acquired by the district through the sale for delinquent assessments or installments shall, after all warrants, bonds and coupons of said local improvement district have been paid in full, be credited to the general fund of the district.
Idaho Code § 43-2543