N.Y. Comp. Codes R. & Regs. tit. 9, § 6217.2 – Initial creation of the statewide voter registration list.

(a) The official statewide voter registration list shall be created by combining the existing voter registration lists maintained by each local Board of Elections into a single integrated list.
(b) To the maximum extent practicable, each local Board of Elections shall continue to use its existing computer infrastructure, computer software and database applications to access data from and transmit data to the statewide voter registration list.
(c) The information required to be sent to the State Board to appear on the list shall be determined by the State Board of Commissioners.
(d) To create such list, each local Board of Elections shall transmit to the State Board a certified copy of the voter registration records of such board in an electronic format prescribed by the State Board and continuing as directed by the State Board.
(e) Once all data from the counties has been received, the State Board shall run a check for duplicate voter registration records within the integrated statewide voter registration list as provided for in these regulations.
(f) After all duplicate registration issues have been resolved, the State Board shall assign a unique identifier to every voter on NYSVoter.
(g) The county board shall append the same unique identifier to any corresponding county record.
(h) Effective date.
Effective immediately except that subdivision (g) of this section shall become effective on July 1, 2007.