§ 27:5-25 — Effect on existing signs

21. A sign erected and maintained with a valid permit issued before the effective date of this act, which does not comply with this act or the rules or regulations adopted pursuant hereto, may continue to be maintained, repaired and restored at the size, location, height, and setback set forth in the permit, including in the event of the partial destruction thereof, without limitation as to time, unless it is totally destroyed or abandoned, or the commissioner finds, pursuant to the authority granted under subsection b. of section 10 of this act, any grounds for revocation of the permit. L.1991,c.413,s.21.