Each and every licensee, subject to the payment of a tax hereunder, is hereby required to keep accurate records, covering the business carried on, and shall, for a period of three (3) years, file and keep his invoices or other memoranda, showing all sales or purchases of such beverages, as herein defined; and such invoices, or memoranda, shall at all times be subject to the examination and inspection of any member or agent of the Oklahoma Tax Commission in the enforcement of this act.

Laws 1947, HB 254, p. 292, § 13.