Okla. Stat. tit. 19, § 178.3

A. The county clerk shall be custodian and repository of all inventory records, files and reports. B. The county clerk in each county in Oklahoma is hereby authorized to destroy all inventory records, files and reports of any inventory of the county which has been disposed of for three (3) years or more if the inventory account has been subject to a full audit by the State Auditor and Inspector.