13. a. For the purposes of the "New Jersey Gross Income Tax Act," N.J.S.54A:1-1 et seq., for taxable years beginning on and after January 1, 2023, notwithstanding any provision in N.J.S.54A:1-1 et seq. or the Corporation Business Tax Act (1945), P.L.1945, c.162 (C.54:10A-1 et seq.) to the contrary, a taxpayer that is subject to the provisions of N.J.S.54A:1-1 et seq. and engages in a trade or business, regardless of business form, or is a partner in a partnership or shareholder of an S corporation, which trade, business, partnership, or S corporation conducts business operations partly within and partly without this State and, as a result thereof or for other reasons that portion of the income from sources within the State cannot readily or accurately be ascertained, the income from the trade, business, partnership, or S corporation shall be sourced in a manner consistent with the provisions of sections 6 through 10 of the Corporation Business Tax Act (1945), P.L.1945, c.162 (C.54:10A-6 through C.54:10A-10). Income that is representative of the taxpayer's salary, wages, tips, fees, commissions, bonuses, and other remuneration shall be sourced pursuant to the provisions of N.J.S.54A:1-1 et seq.
b. The director shall promulgate rules and regulations necessary to carry out the provisions of this section.