N.J. Stat. Ann. § 40A:12-35

Within 30 days of the enactment of an ordinance establishing an urban homesteading program and designating the urban homesteading agency, the tax collector shall submit to the homesteading agency a certified list of all in rem properties within the municipality. At least quarterly thereafter, the tax collector shall review and update that certified list and report any changes in the number of in rem properties to the urban homesteading agency.