(b) Except as otherwise provided in this section, moneys in the Nassau county bond deficit fund may be appropriated from and transferred to or expended in any fiscal year only for the purpose of payment of the principal of and interest on bonds and notes authorized by a chapter of the laws of nineteen hundred ninety-two, entitled "AN ACT authorizing the county of Nassau to issue serial bonds and/or bond anticipation notes for the purpose of liquidating deficits in the county's general fund and to amend the tax law, in relation to authorizing the county of Nassau to impose a county recording tax on obligations secured by a mortgage on real property; to amend the county government law of Nassau county (Nassau County Charter) and the Nassau county administrative code, in relation to the imposition of an exigency tax". When the amount of moneys in such fund is sufficient to pay all future debt service on such notes and bonds, the comptroller of the county of Nassau shall so notify the commissioner of taxation and finance by certified mail. When no such bonds or notes remain outstanding, such fund shall terminate and moneys remaining therein shall be deposited in the general fund of such county for expenditure on county purposes. 6. Any local law imposing a tax pursuant to the authority of this section or repealing or suspending such a tax shall take effect only on the first day of a calendar month or in September of nineteen hundred ninety-two on the sixth, thirteenth, twentieth or twenty-seventh day of such month. Such a local law shall not be effective unless a certified copy thereof is mailed by registered or certified mail to the commissioner of taxation and finance at the commissioner's office in Albany at least thirty days prior to the date the local law shall take effect. 7. Certified copies of any local law described in this section shall also be filed with the county clerk, the secretary of state and the state comptroller within five days after the date it is duly enacted.