For purposes of this subsection, "sole sex offense" means a single conviction, adjudication of guilty or acquittal by reason of insanity, as the case may be, for a sex offense which involved no more than one victim, no more than one occurrence or, in the case of an offense which meets the criteria of paragraph (2) of this subsection, members of no more than a single household.
N.J.S. § 2C:7-13