N.J. Stat. § 58:14-5
No commissioner shall be directly or indirectly interested in any contract awarded under the provisions of this chapter, nor in furnishing materials or supplies therefor to any contractor, nor in furnishing security for the performance of any contract. If at any time it shall appear to the satisfaction of the governor that any commissioner is or has been so interested, or is or has been a stockholder in any corporation furnishing material or supplies to any contractor for work done or to be done under the provisions of this chapter, or that he is the owner of any lands or water or water rights taken or to be taken or used in or for the construction of any work under the provisions of this chapter, or a stockholder in any corporation owning or leasing any such lands or waters or water rights, the governor shall remove such commissioner from office forthwith, and all contracts made by the commissioners wherein any such commissioner shall have been interested, directly or indirectly, as aforesaid, or otherwise, shall thereupon become and be null and void, and no further payments on account thereof shall be made by the commissioners.
N.J.S. § 58:14-5