[directive] New Jersey law lists firearms that are prohibited "assault firearms."  N.J.S. A. 2C:39-1w.(1).  In addition, the law provides that the term "assault firearm" includes, "Any firearm manufactured under any designation which is substantially identical to any of the firearms listed" in the law.  N.J.S.A. 2C:39-1w.(2).  Thus, a firearm is an assault firearm if it is included on the list of banned firearms or if it is manufactured under a different designation than a firearm on the list but is "substantially identical" to a specific listed firearm.  We believe "substantially identical" is clear by its plain meaning.  The Criminal Code provides that the statutes in the Code must be read "according to the fair import of their terms."  N.J.S.A. 2C:1-2c.  The Criminal Code explains that where language may be susceptible to different readings it must be construed to "give fair warning of the nature of the conduct proscribed."  N.J.S.A. 2C:1-2a.(4), c.  Simply put, the phrase "substantially identical" must be given its plain meaning, one that gives fair warning.  The term "substantial" means pertaining to the substance, matter, material or essence of a thing.  The term "identical" means exactly the same.  Hence, a firearm is substantially identical to another only if it is identical in all material, essential respects.  A firearm is not substantially identical to a listed assault firearm unless it is identical except for differences which do not alter the essential nature of the firearm.  The following are examples of manufacturer changes that do not alter the essential nature of the firearm: name or designation of the firearm; the color of the firearm; the material used to make the barrel or stock of the firearm; the material used to make a pistol grip; a modification of a pistol grip.  This is not an exclusive list.  A semi-automatic firearm should be considered to be "substantially identical," that is, identical in all material respects, to a named assault weapon if it meets the below listed criteria: semi-automatic rifle that has the ability to accept a detachable magazine and has at least 2 of the following: a folding or telescoping stock; 2. a pistol grip that protrudes conspicuously beneath the action of the weapon; 3. a bayonet mount; a flash suppressor or threaded barrel designed to accommodate a flash suppressor; and 5. a grenade launcher; B. a semi-automatic pistol that has an ability to accept a detachable magazine and has at least 2 of the following: 1. an ammunition magazine that attaches to the pistol outside of the pistol grip; 2. a threaded barrel capable of accepting a barrel extender, flash suppressor, forward handgrip, or silencer; 3. a shroud that is attached to, or partially or completely encircles, the barrel and that permits the shooter to hold the firearm with the nontrigger hand without being burned; 4. manufactured weight of 50 ounces or more when the pistol is unloaded; and 5. a semi-automatic version of an automatic firearm; and, C. a semi-automatic shotgun that has at least 2 of the following: 1. a folding or telescoping stock; 2. a pistol grip that protrudes conspicuously beneath the action of the weapon; 3. a fixed magazine capacity in excess of 5 rounds; and 4. an ability to accept a detachable magazine.