A. An Oklahoma certified real estate appraiser shall retain for five (5) years, originals or true copies of all written contracts engaging that appraiser's services for real property appraisal work, and all reports and supporting data assembled and formulated by the appraiser in preparing the reports.

B. This five-year period for retention of records is applicable to each engagement of the services of the appraiser and shall commence upon the date of the submittal of the appraisal to the client unless, within such five-year period, the appraiser is notified that the appraisal or report is involved in litigation, in which event the five-year period for the retention of records shall commence upon the date of the final disposition of such litigation.

C. All records required to be maintained pursuant to the provisions of the Oklahoma Certified Real Estate Appraisers Act shall be made available by the Oklahoma certified real estate appraiser for inspection and copying by the Board on reasonable notice to the appraiser.