New York Codes, Rules and Regulations
Title 19 - DEPARTMENT OF STATE
Chapter VI - Division of Cemeteries
Part 203 - Crematory Regulations
Section 203.7 - Commingling human remains
The cremation of remains of more than one deceased human being in a retort at any one time is unlawful, except upon written authorization signed by the persons making funeral arrangements and the persons in control of disposition, and the signed consent of the crematory, which record shall be retained in the permanent file of the crematory.