Writ of actual innocence; previously unknown or unavailable nonbiological evidence; contents and form of petition. Changes the provision requiring that a petitioner petitioning for a writ of actual innocence based on previously unknown or unavailable nonbiological evidence allege that such evidence is such as could not, by the exercise of diligence, have been discovered or obtained before the expiration of 21 days following entry of the final order of conviction or adjudication of delinquency by the circuit court to instead require that the petitioner allege such evidence could not have been discovered or obtained before the conviction or adjudication of delinquency became final in the circuit court.