N.Y. Real Property Tax Law § 400: United States

§ 400. United States. 1. Real property owned by the United States

shall be exempt from taxation, except as otherwise provided by the laws

of the United States.

2. Real property occupied exclusively or in part by the United States

pursuant to the provisions of the public buildings purchase contract act

of nineteen hundred fifty-four (Public Law 519, 83rd Congress) shall be

exempt from taxation and exempt from special ad valorem levies and

special assessments to the extent provided in section four hundred

ninety of this chapter, during the period that the United States is

required to make reimbursement for taxes payable on such property,

provided that the United States enters into an agreement or agreements

with the municipal corporation or corporations in which such properties

are located, whereby it will undertake to pay a fair and reasonable sum

annually on such property as taxes. Where a part of the property is so

occupied by the United States, such part only shall be exempt and the

remainder thereof shall be subject to taxation, special ad valorem

levies and special assessments. The sums received by any municipal

corporation pursuant to this subdivision shall be devoted to purposes to

which taxes may be applied.