N.Y. Pub. Auth. Law § 1082
It is hereby determined that the creation of the authority and the carrying out of its corporate purposes is in all respects for the benefit of the people of the county, and is a public purpose, and the authority shall be regarded as performing a governmental function in the exercise of the powers conferred upon it by this title and shall not be required to pay any taxes, special ad valorem levies or special assessments upon any property owned by it or under its jurisdiction, control or supervision or upon its activities, or any filing, recording or transfer taxes in relation to instruments filed, recorded or transferred by it or on its behalf. Any bonds or notes issued pursuant to this title, together with the income therefrom shall be exempt from taxation, except for transfer and estate taxes. The revenues, monies and other properties and the activities of the authority shall be exempt from taxes and governmental fees or charges, whether imposed by the state or any municipality, including real estate taxes, franchise taxes or other excise taxes. The state of New York covenants with the purchasers and with all subsequent holders and transferees of bonds and notes issued by the authority pursuant to this title, in consideration of the acceptance of and payment for the bonds and notes that the bonds and notes of the authority issued pursuant to this title and the income therefrom, and all moneys, funds and revenues pledged to pay or secure the payment of such bonds and notes, shall at all times be free from taxation except for transfer and estate taxes.
N.Y. Pub. Auth. Law § 1082