N.J. Stat. § 6:1-84
The commissioner shall adopt rules and regulations, pursuant to "Administrative Procedure Act," P.L. 1968, c.410 (C.52:14B-1 et seq.), promulgating standards which specify permitted and prohibited land uses, including the specification of the height to which structures may be erected and trees allowed to grow, within airport safety zones. These standards shall be uniform for all airport safety zones, except that where the commissioner determines that local conditions require it, he may adopt an amended or special standard. No standard adopted under this amendatory and supplementary act shall be construed to require the removal, lowering or other change or alteration of any structure or tree not conforming to the standard when adopted or amended, or otherwise interfere with the continuance of any nonconforming use, except as provided in section 9 of this amendatory and supplementary act.
N.J.S. § 6:1-84