Each eligible group or organization conducting a charitable gaming event more than one time per month shall file a quarterly charitable gaming event report on a form supplied by the Department, within thirty (30) days from the end of each quarter as established by the Director. The reports shall include the following information: The dates of each charitable gaming event held during the reporting period; The gross and net income derived from each event; An itemized list of expenses, including the names and addresses of each vendor and lessor, the necessity of each expense, date of purchase or lease, and, if prepaid before the event(s), the source of the payment; As of the date of filing, an itemized list of any gifts or donations made from the proceeds of the charitable gaming event, including: The name, address, and tax identification number of each person, group, or organization receiving such gifts or donations; and The dates and amounts of each gift or donation; A statement of the organization's intent as to the disposition of any unexpended portion of net proceeds from such events; and A list of all persons who worked at charitable gaming events during the reporting period. Each eligible group or organization shall file an annual report for the preceding calendar year, on a form supplied by the Department, not later than April 15 of each year (beginning April 15, 1998). The report shall contain a summary of the previous year's activities and a statement of how the organization's charitable gaming event activities continually and substantially work towards the organization's stated goals and activities. The group or organization shall also submit an unqualified audited financial statement concerning the operation of its charitable gaming activities, prepared by an independent certified public accountant and a copy of its most recent IRS 990 and State Form COF-85, or any other substitute documents deemed necessary by the Director on the same day as the organization's Federal Tax Returns are due.