N.J. Stat. Ann. § 30:4-15

The board of managers of any institution or noninstitutional agency set forth in section 30:1-7 of the Revised Statutes may maintain a commissary or store for the sale of commodities to patients, inmates, visitors and personnel under rules adopted by the board. The cost of establishing the commissary or store may be defrayed out of any funds appropriated for current maintenance. Any profit accruing may be used by the board for the use, benefit and general welfare of the inmate or patient population as a whole.