New Jersey Statutes Title 40. Municipalities and Counties 40 § 48-2.31

Whenever the municipality by inspection or otherwise discovers a nuisance as provided in section 3 of this act,  1 notice in writing shall be given to the owner of the premises to remove or abate the same within the time specified in such notice, which shall be not less than 7 days from the date of service thereof. A duplicate of the notice shall be left with a tenant or occupant of the premises, if any. If the owner resides outside the State the notice shall be given by mail and provide additional time for compliance and a duplicate of the notice shall be left with a tenant or occupant or posted on the premises.