New Jersey has designated three categories of officiants legally sanctioned to perform marriages in New Jersey.

Judges - (of any level from Municipal (i.e. Traffic Court) through Superior (including Appellate) Court. (We don't know whether this piece of information is accurate, or a successful attempt by a family member to "not get involved", but we once filled in as an officiant for a couple whose uncle, a judge, had to opt out of officiating because he had just been elevated to the State Supreme Court and was no longer legally sanctioned to marry couples). If you have any doubt - ask!

Mayors - (and others, depending on a municipality's organization, who serve a mayoral function, including, in some municipalities, deputy mayors, city council presidents, County clerks and the Governor). If you have any doubt - ask!

Clergy - (Individuals designated by Ordination, appointment, or organizational designation, who may act on the behalf of an assigning body to serve in this broad category.) New Jersey allows a very liberal interpretation of this category, as is fitting, because of the Constitutional Mandate separating "Church" and "State". If you have any doubt - ask!.

You will note that "Justice of the Peace" is not a category and also that New Jersey, unlike Florida as an example, does not extend the duty and privilege to "Notary Publics" to marry couples.