For the purpose of guaranteeing, to the extent of such fund, the payment of bonds or warrants and interest thereon issued by Ada County in payment of all costs and expenses incurred, assessed against, and charged upon all lots and lands abutting, adjoining, contiguous and adjacent to any improvements ordered by the board of county commissioners and included within the boundaries of local improvement districts created by the board, there is hereby created a local improvement guarantee fund. (Ord. 117, 8-12-1981)