Section 42-13051 - Duties of county assessorA. Not later than December 15 of each year the county assessor shall identify by diligent inquiry and examination all real property in the county that is subject to taxation and that is not otherwise valued by the department as provided by law.B. The assessor shall: 1. Determine the names of all persons who own, claim, possess or control the property, including properties subject to the government property lease excise tax pursuant to chapter 6, article 5 of this title.2. Determine the full cash value of all such property as of January 1 of the next year by using the manuals furnished and procedures prescribed by the department.3. List the property with the determined valuation for use on the tax roll and report to the department of education the determined valuations of properties that are subject to the government property lease excise tax pursuant to chapter 6, article 5 of this title.C. In identifying property pursuant to this section, the assessor shall use aerial photography, applicable department of revenue records, building permits and other documentary sources and technology.