75 Pa.C.S. § 3812: Preliminary hearing or arraignment.

The presiding judicial officer at the preliminary hearing or preliminary arraignment relating to a charge of a violation of section 1543(b)(1.1) (relating to driving while operating privilege is suspended or revoked), 3802 (relating to driving under influence of alcohol or controlled substance) or 3808(a)(2) (relating to illegally operating a motor vehicle not equipped with ignition interlock device) shall not reduce or modify the original charges without the consent of the attorney for the Commonwealth.