N.J. Stat. § 4:19-15.2
Any person who shall own, keep or harbor a dog of licensing age shall annually or every third year, in accordance with a 3-year dog license or renewal thereof issued under subsection b. of section 12 of this act (C. 4:19-15.12b), apply for and procure from the clerk of the municipality or other official designated by the governing body thereof to license dogs in the municipality in which he resides, a license and official metal registration tag for each such dog so owned, kept or harbored, and shall place upon each such dog a collar or harness with the registration tag securely fastened thereto. A person or group temporarily caring for a dog placed in a foster home as part of a formalized training to be a guide dog or service dog shall be exempt from applying for and procuring a license and registration tag for the dog while the dog remains in the foster home for such training.
For the purposes of this section, "guide dog" and "service dog" mean a guide dog or service dog as defined in section 5 of P.L. 1945, c.169 (C.10:5-5).
N.J.S. § 4:19-15.2