N.Y. TAX Law § 1449-G

§ 1449-g. Imposition of tax. Notwithstanding any other provisions of\nlaw to the contrary, the county of Broome, acting through its local\nlegislative body, is hereby authorized and empowered to adopt and amend\nlocal laws imposing in such county a tax on each conveyance of real\nproperty or interest therein when the consideration exceeds five hundred\ndollars, at the rate of fifty cents for each five hundred dollars or\nfractional part thereof. Such local law shall apply to any conveyance\noccurring on or after the first day of a month to be designated by such\nlegislative body, which is not less than sixty days after the enactment\nof such local laws, but shall not apply to conveyances made on or after\nsuch date pursuant to binding written contracts entered into prior to\nsuch date, provided that the date of execution of such contract is\nconfirmed by independent evidence such as the recording of the contract,\npayment of a deposit or other facts and circumstances as determined by\nthe treasurer.\n