Idaho Code § 44-502
Any person, persons, company or corporation who shall engage in working, developing or prospecting any mine, mines, mining claim or premises, or in running any tunnel, or in repairing or erecting any building, or in constructing any canal, ditch, railroad, wagon road, aqueduct or other structure, and shall employ any mechanics or laborers in prosecuting said work, shall, before employing said mechanics or laborers or any of them, make a statement under oath containing the data provided for in section 44-501 [, Idaho Code], and file the same for record in the office of the recorder of the county in which said labor is being done, and if there be a district recorder, then also in the office of said district recorder of the district where said mechanics or laborers are employed, and also to post similar statements in his or its office, at the place where the payment of wages is to be made, and in a public and conspicuous place where it can be easily seen at or near the place where said mechanics or laborers are employed.
Idaho Code § 44-502