N.J. Stat. § 54A:2-1.2
The Attorney General shall review the enactments of the State of New York to determine if the method of taxation of the income from New York sources of taxpayers that are not residents of New York, enacted pursuant to 1987 N.Y. Laws 28, compiled as subsection (e) of N.Y. Tax 601, and requiring that every New York nonresident taxpayer compute a tax as if such resident were a resident and multiply that liability by a fraction the numerator of which is the taxpayer's New York source income as therein determined and the denominator of which is the taxpayer's federal adjusted gross income for the taxable year, has been repealed or superceded by subsequent enactment so as to restrict the computation of liability owed to New York to a method based only on the New York source income of the taxpayer. If the Attorney General shall so determine, the Attorney General shall, not later than five days after such enactment, certify to the Director of the Division of Taxation the taxable years for which the fractional method of liability calculation for nonresident taxpayers has been repealed or superceded.
N.J.S. § 54A:2-1.2