New York Codes, Rules and Regulations
Title 15 - Department of Motor Vehicles
Chapter I - REGULATIONS OF THE COMMISSIONER
Subchapter G - Uniform Traffic Ticket, Form Of Waiver And Certifying And Recording Convictions
Part 91 - Uniform Traffic Ticket
Section 91.18 - Police officer procedure for uniform traffic ticket (tsleand d area)

When an alleged traffic violator is issued a uniform traffic ticket, the police officer shall sign and print his name on part I of the packet. Such signature constitutes the affirmation of the information under penalty of perjury. The officer shall deliver part III or part V, whichever is appropriate, to the alleged violator, and shall deliver parts I and II, with carbon still in place, to the court or traffic violations bureau in which the alleged violator is notified to appear. He shall deliver parts IV and V (or, in the Cities of Buffalo and Rochester, part IV alone) to the enforcement agency, and retain part VI for his own records.