N.J. Stat. § 2A:18-61.8
Any owner who intends to convert a multiple dwelling as defined in P.L. 1967, c. 76 (C. 55:13A-1 et seq.), other than a hotel or motel, or a mobile home park into a condominium or cooperative, or to fee simple ownership of the several dwelling units or park sites shall give the tenants 60 days' notice of his intention to convert and the full plan of the conversion prior to serving notice, provided for in section 3 of P.L. 1974, c. 49 (C. 2A:18-61.2). A duplicate of the first such 60-day notice and full plan shall be transmitted to the clerk of the municipality at the same time. In the notice of intention to convert tenants shall be notified of their right to purchase ownership in the premises at a specified price in accordance with this section, and their other rights as tenants under this act in relation to the conversion of a building or park to a condominium, cooperative or fee simple ownership. A tenant in occupancy at the time of the notice of intention to convert shall have the exclusive right to purchase his unit, the shares of stock allocated thereto or the park site, as the case may be, for the first 90 days after such notice that such purchase could be made during which time the unit or site shall not be shown to a third party unless the tenant has in writing waived the right to purchase.
N.J.S. § 2A:18-61.8