N.J. Stat. Ann. § 2A:50-62

10. The provisions of sections 1 through 9 of this act shall not apply to the foreclosure of a non-residential mortgage nor to collection of the obligation by means other than enforcing the lender's lien on the residential property. A lender shall not be required to foreclose a residential mortgage and a non-residential mortgage securing the same obligation in the same proceeding.