Pennsylvania Statutes Title 74 Pa.C.S.A. Transportation § 6502. Offense

(1) while under the influence of alcohol;

(2) while under the influence of a controlled substance which affects the individual's faculties in any way contrary to safety;

(3) when the alcohol concentration in the individual's blood or breath, as measured within two hours of the time of operation, or attempted operation, is 0.02% or more;

(4) while under the influence of any combination of a controlled substance and alcohol which affects the individual's faculties in any way contrary to safety; or

(5) within eight hours after consumption of “liquor” or a “malt or brewed beverage” as defined in section 102 of the act of April 12, 1951 (P.L. 90, No. 21),  1 known as the Liquor Code.