Any person who, on the effective date of this amendatory and supplementary act, is serving a minimum mandatory sentence as provided for by N.J.S. 2C:43-6c. solely as a result of his conviction under subsection a. of N.J.S. 2C:39-4
for the possession of a firearm with intent to use it against the property of another, and has not had his sentence suspended or been paroled or discharged, may move to have his sentence reviewed by the sentencing court. For good cause shown, the court may impose any sentence which would have otherwise been available for such person.