New York State Law Section 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.

Last modified: February 3, 2019