Each licensee shall keep and use in the licensed premises those books, accounts, and records that will enable the department to determine whether the licensee is complying with this chapter and with the regulations lawfully adopted by the department under this chapter. The maintenance of separate books and records for another business authorized by the department under Alaska Stat. § 06.20.210 is not required. The method of tracking and numbering the loans shall be determined by the licensee, as long as the system enables the department to perform the department’s obligations under this title. The licensee shall preserve the books, accounts, and records, including cards used in the card system, if any, for two years after making the final entry on any recorded loan.