(a) This article shall apply to all criminal cases in which at least one felony offense is charged in the event that at or prior to arraignment, or at such time as the court permits, the defendant provides written notice to the prosecuting attorney that such defendant elects to have this article apply to the defendant's case. When one defendant in a multidefendant case demands discovery under this article, the provisions of this article shall apply to all defendants in the case, unless a severance is granted.

(b) This article shall not apply to juvenile court proceedings.

(c) Except as provided under Code Section 17-16-8, this article is not intended to authorize discovery or inspection of attorney work product.

(d) This article shall apply also to all criminal cases in which at least one felony offense is charged which was docketed, indicted, or in which an accusation was returned prior to January 1, 1995, if both the prosecuting attorney and the defendant agree in writing that the provisions of this article shall apply to the case.