N.J. Stat. § 54:50-25
Notwithstanding any other provision of law, each State agency, as part of the procedure for granting, renewing, amending, supplementing, or reinstating the license of any person, or at the time the State agency contracts to purchase or purchases goods or services or leases real or personal property from any person, or contracts for the construction, alteration or renovation of real property, including the construction or repair of highways, roads, streets or similar projects, shall require each person to provide to the State agency that person's federal social security number or federal taxpayer identification number, or both numbers when the person has both numbers, or, where the person does not have a federal social security number or federal taxpayer identification number, the reason why such person does not have that number. The numbers or reasons shall be obtained by such agency as part of the administration of the taxes administered by the Director of the Division of Taxation for the purpose of establishing the identification of persons affected by such taxes.
Whenever a partnership or S corporation is under contract with a State agency, the partnership or S corporation shall provide to the State agency for each partner of the partnership or shareholder of the S corporation the federal social security number or federal taxpayer identification number, or both when the partner or shareholder has both numbers, or, when the partner or shareholder does not have either number, the reason or reasons why the partner or shareholder does not have either number. The partnership or S corporation shall identify the share of ownership attributable to each partner or shareholder whenever the partnership or S corporation is required to furnish the federal social security number of each partner or shareholder, or federal taxpayer identification number of each partner or shareholder, or both, if applicable under this section, or when the partner or shareholder does not have either number.
N.J.S. § 54:50-25