In addition to the exemptions allowed under N.J.S. 54A:3-1, each taxpayer shall be allowed an additional exemption which may be taken as a deduction from his New Jersey gross income in amount of $1,000.00 for each dependent under the age of 22 years who is attending an accredited post-secondary institution of higher education on a full time basis and for whom the taxpayer paid one-half or more of the costs of tuition and maintenance of the dependent's attendance at such institution.
N.J.S. § 54A:3-1.1