N.J. Stat. § 39:4-98.7: Speeding 20mph or more over limit; fines, certain; doubled

6. The fine for a motor vehicle offense shall be double the amount specified by law when traveling 20 miles per hour or more over the designated speed limit as set forth in R.S.39:4-98, except as provided in subsection b. of section 1 of P.L.1993, c.332 (C.39:4-203.5) and subsection a. of section 5 of P.L.1997, c.415 (C.39:4-98.6).

L.1997,c.415, s.6.