N.J. Stat. Ann. § 4:5-106.19

Nothing herein contained shall preclude municipal regulation of garbage-feeding hog farms, provided such municipal control is consistent with, and in furtherance of, the provisions of this act; nor shall anything herein contained prevent the adoption of any ordinance or other regulation by the governing body or the local board of health of any municipality to exclude from the municipality any garbage-feeding hog farms or the importation of garbage into the municipality for hog feeding purposes; nor nullify any existing valid ordinance or other regulation of such nature heretofore adopted.