NYC Transit Subway Rule 1050.9(C)

NYC Transit Subway Rule 1050.9(C)

Photography, filming or video recording in any facility or conveyance is permitted except that ancillary equipment such as lights, reflectors or tripods may not be used. Members of the press holding valid identification issued by the New York City Police Department are hereby authorized to use necessary ancillary equipment. All photographic activity must be conducted in accordance with the provisions of this Part.

Here is the link: http://www.mta.info/nyct/rules/rules.htm