in which defendants have either been bound over to the superior court based on a finding of probable cause pursuant to a commitment hearing under Article 2 of this chapter or have expressly or by operation of law waived a commitment hearing, the district attorney shall have authority to prefer accusations, and the defendants shall be tried on such accusations according to the same rules of substantive and procedural laws relating to defendants who have been indicted by a grand jury.
OCGA § 17-7-70.1