Notwithstanding any other provisions of this article to the contrary, any charitable or public service organization which has been in existence in this state for at least one year is hereby authorized to conduct raffles without compliance with the licensing provisions of this article: Provided, That any prize awarded in any single raffle at a raffle occasion may not exceed in value the sum of $4,000: Provided, however, That the cumulative gross proceeds derived from the conduct of raffle occasions by any such charitable or public service organization shall not exceed $15,000 during any calendar year: Provided further, That any such organization shall not be subject to the record keeping provisions of section sixteen of this article but shall maintain a separate accounting for the operation of raffles. All records required by this section shall be maintained for at least three calendar years and shall be available for reasonable inspection by the commissioner.