The revenues allocated and deposited into the trust fund may be used for the purchase of farmland development rights, open space, wetlands, woodlands, pine barrens, and other lands which are suitable only for passive, recreational use, land for use as hamlet greens, hamlet parks, pocket parks (with the effect of providing public spaces that reinforce community livability by enhancing the pedestrian-friendly nature of communities, including uses for outdoor activities, playgrounds, and other public gathering purposes), active parkland, active recreation, historic and/or cultural park uses, or the payment of debt service on serial bonds or notes authorized via duly enacted resolution of the County of Suffolk and issued for the purchase of farmland development rights, open space, wetlands, woodlands, pine barrens, and other lands which are suitable only for passive, recreational use, land for use as hamlet greens, hamlet parks, pocket parks (with the effect of providing public spaces that reinforce community livability by enhancing the pedestrian-friendly nature of communities, including uses for outdoor activities, playgrounds, and other public gathering purposes), active parkland, active recreation, historic and/or cultural park uses. Principal and interest expenses, bond or note issuance costs and all other expenses directly related to the bonds or notes issued for such farmland development rights, open space, wetlands, woodlands, pine barrens, and other lands which are suitable only for passive, recreational use, land for use as hamlet greens, hamlet parks, pocket parks (with the effect of providing public spaces that reinforce community livability by enhancing the pedestrian-friendly nature of communities, including uses for outdoor activities, playgrounds, and other public gathering purposes), active parkland, active recreation, historic and/or cultural park uses acquisition may be paid from the sales tax revenues in the trust fund. The amount of debt service and bond or note issuance costs paid from the trust fund in any calendar year shall not exceed 80% of the unobligated projected sales tax revenues for such calendar year. A projection of annual sales tax revenues for the current calendar year, and the three calendar years immediately following, shall be prepared in a written report and shall be jointly certified by the County Executive's Office and the Legislative Budget Review Office as follows: one month prior to the sale of any Suffolk County bond or note, or 45 days prior to the debt service of any bond or note becoming due and payable by Suffolk County, whichever is sooner, and on September 1 of each calendar year. On an annual basis, actual sales tax revenues allocated and deposited into the trust fund that exceed debt service requirements for the current calendar year shall be reserved by Suffolk County for future debt service payments in the event future annual debt service requirements are projected to exceed 80% of the unobligated projected sales tax revenues. In the event such reserved revenues become unnecessary to ensure that the eighty-percent cap is not exceeded, such revenues may be used for the acquisition of farmland development rights, open space, wetlands, woodlands, pine barrens, and other lands which are suitable only for passive, recreational use, land for use as hamlet greens, hamlet parks, pocket parks (with the effect of providing public spaces that reinforce community livability by enhancing the pedestrian-friendly nature of communities, including uses for outdoor activities, playgrounds, and other public gathering purposes), active parkland, active recreation, historic and/or cultural park uses under this program.