N.J. Stat. Ann. § 40:56-86

The municipality may, by ordinance, delegate to the district management corporation the contracting of work to be done on any street or streets, or on other municipal property, included in the special improvement district. The corporation shall be a "contracting unit" within the meaning of the "Local Public Contracts Law," P.L.1971, c. 198 (C. 40A:11-1 et seq.). The plans and specifications for the work to be contracted shall be approved by the municipal engineer prior to initiation of any action for the awarding of a contract under that act.