New York Laws
Article 4 - Purchase and Acquisition of Land by the United States
53 - Concurrent Jurisdiction as to Service of Process.

§ 53. Concurrent jurisdiction as to service of process. The said
jurisdiction so ceded shall be upon the express condition that the state
of New York shall retain a concurrent jurisdiction with the United
States on and over the property and premises so conveyed, so far as that
all civil and criminal process, which may issue under the laws or
authority of the state of New York, may be executed thereon in the same
way and manner as if such jurisdiction had not been ceded, except so far
as such process may affect the real or personal property of the United
States.

Structure New York Laws