N.J. Stat. § 30:9-87
Notwithstanding the provisions of the "Local Public Contracts Law," P.L. 1971, c. 198 (C. 40A:11-1 et seq.) to the contrary, a hospital or institution for the aged and disabled operated under the authority of chapter 9 of Title 30 of the Revised Statutes by a county or municipality, or a county-operated facility licensed by the State Department of Health as a long term care facility, may enter into any contract and make any arrangement with any other such hospital or with any other State, federal or privately owned hospital, or any medical school, or other health related facility having or using hospital services or facilities for the joint purchase of any material, supply or service through a private nonprofit hospital association.
N.J.S. § 30:9-87