The County Assessor shall examine each application or letter of qualification and shall determine whether the application and supporting documentation is sufficient and valid. In making this determination the Assessor shall, if necessary, make inspections, make a written request for additional information, or examine any person under oath as provided by law. The Ad Valorem Division and Department of Environmental Quality shall assist the Assessor in the determination, if requested.
Okla. Admin. Code § 710:10-13-7