N.J. Stat. § 51:1-29.1
Notwithstanding any other provision of law to the contrary, a person may manufacture, pack, distribute, deliver, cause to be delivered, sell, expose for sale, or have in his possession with intent to do any of the foregoing, a commodity in package form consisting predominantly (more than 50%) of a hydrate of sodium tetraborate when the net weight of the contents of the package is less than that specified on its label, provided that (1) the package otherwise complies with current law, (2) the package bears a statement specifying the net quantity of its contents by volume, and (3) the volume of the contents of the package, measured by a reproducible free-fall method, equals or exceeds the volume so specified. If the National Bureau of Standards has published a reproducible free-fall method for measuring the volume of such a commodity, that method shall be used for this section. A person may represent the price of such a commodity based upon the weight specified on its label.
N.J.S. § 51:1-29.1