If the definition or standard of identity, purity, quality, or strength of a particular food, drug, cosmetic or device has not been fixed by any law of this State, but such definition or standard has been or may hereafter be established under the Federal Act, the State Department of Health may adopt the definition or standard so established and published.
If such definition or standard shall be changed at any time by the agency administering the Federal Act, after the adoption of the definition or standard, it shall not continue in effect in this State after such change has become operative.
N.J.S. § 24:6-1