12. The holder of a permit shall obtain the vouchers for all purchases of medicines, medicinal premixes or medicinal foods and keep them at the place of operation covered by the permit for a period of 2 years from the date of purchase.
O.C. 728-87, s. 12; O.C. 1633-92, s. 7; 1443-2022O.C. 1443-2022, s. 91.