Citation Codes Equivalent Citations citation codes Docket Number No. 739 MAL 2009. See more information ... Smart Summary Please sign up to generate summary. COMMONWEALTH of Pennsyl v. nia, Petitioner ORDER PER CURIAM. AND NOW, this 14th day of September, 2010, the Petition for Allowance of Appeal is GRANTED. The issue, rephrased for clarity, is Whether expert testimony is required to prove that the amount of a controlled substance found in a defendant's blood or urine caused the driving impairment charged under 75 Pa.C.S. § 3802(d).