OPINION — AG — QUESTION: WILL THE BOAT REGISTRATION DEPARTMENT BE REQUIRED BY LAW TO KEEP THESE CERTIFICATES OF ASSESSMENT ON FILE, AND IF SO, FOR WHAT PERIOD OF TIME? — NEGATIVE CITE: 63 O.S. 1961 804 [63-804](A), 68 O.S. 1965 Supp., 2425 [68-2425] (HARVEY CODY)