Idaho Code § 63-209
The assessor must have prepared a full, accurate and complete plat record of all parcels of real property within his county. Township, range and section lands shall be platted thereon in such manner as to correspond with the technical description of such lands as described by the government survey thereof. Subdivision, townsite, and metes and bounds lands shall be platted thereon according to the official record thereof. The plats shall be prepared pursuant to rules promulgated by the state tax commission which shall establish scales and other criteria. All parcels of real property shall be numbered pursuant to a uniform numbering system to be established by the state tax commission and such parcel numbers shall be used as one (1) means of identifying such parcels. Such numbers shall be used on all records in county offices and shall appear on valuation assessment and tax notices. All necessary and reasonable expense incurred by the assessor in complying with the provisions of this section shall be a legal claim against the county.
Idaho Code § 63-209