N.J. Stat. Ann. § 18A:13-15

The board of education of any regional school district may from time to time acquire for school purposes, by purchase, condemnation or otherwise, lands or premises not exceeding 45 acres in extent and situated in whole or in part in any one or more municipalities adjoining the regional school district, and all of the proceedings to acquire such lands or premises shall be in accordance with the provisions of this title.