A licensee holding a class C-1 or C-2 license shall keep or cause to be kept, at the licensed premises, records showing all sales such that the licensee can document that fifty percent (50%) or more of the gross revenue in any month from the operation of the licensed premises is derived from the serving of meals. Such records shall, at all times during business hours of the day, be subject to inspection by representatives of the liquor commission and copies thereof shall be produced to the liquor commission within seven (7) days of a written request for same. Such records shall be preserved for a minimum period of two (2) years. Failure to maintain or produce such records is unlawful and shall be cause for revocation of the license to sell any alcoholic liquor. The information contained in such records shall be held in confidence by the liquor commission unless such records are to be utilized in any hearings on any charges brought against the licensee. (Ord. 97-30, 9-18-1997)