New Jersey Statutes Title 39. Motor Vehicles and Traffic Regulation 39 § 3-61.2

(a) Any 2 or more lighting devices and reflectors may be combined into one shell or housing except as stated below, provided that the requirements for each required lighting device or reflector are met and that neither the mounting nor the use of any nonrequired lighting device is inconsistent with this article in any respect:

(b) Any lamp or lamps combined in the same shell or housing with a turn signal may be turned off by the same switch that turns the signal on for flashing, and turned on again when the turn signal as such is turned off.