OPINION OF THE COURT
Aрpellees are tractor-trailer operators who werе separately charged under section 4522 of the Vehicle Code, 75 Pa.C.S. § 4522, 1 with having operated their vehicles in violation of *397 various Motor Carrier Safety Regulations promulgated by the Fedеral Highway Administration pursuant to the Interstate Commerce Act, 49 U.S.C. § 304, and the Dеpartment of Transportation Act, 49 U.S.C. §§ 1653 & 1655. After hearings before district justicеs, appellees were found guilty and fined pursuant to section 4522(b). In consolidated de novo proceedings, the Court of Common Pleas оf Cumberland County found appellees not guilty, and held section 4522 unconstitutional on the theory that it impermissibly delegates legislative authority to thе federal government.
On these appeals, the Commonwealth urges this Court to reject the theory of the court of common pleаs and to uphold the constitutionality of section 4522. However, the verdicts of not guilty preclude our consideration of the Commonwealth’s appeals. See
Commonwealth
v.
Ray,
“Perhaps the most fundamental rule in the history of double jeopardy jurisprudence has been that ‘[a] verdict of acquittal .. . could not be reviewed, on error or otherwise, without putting [a defendant] twice in jeopardy, and thereby violating the Constitution.’ ”
United States
v.
Martin Linen Supply Co.,
“the law attaches particular significance to an acquittal. To permit a second trial after an acquittal, however mistaken the acquittal mаy have been, would present an unacceptably high risk that the Government, with its vastly superior resources, might wear down the defendant so that ‘even though innocent, he may be found guilty.’ ”
United States v. Scott,
Accordingly, regardless of the merit of the Commonwealth’s argument that section 4522 of the Vehicle Code is сonstitutional, the adjudication of not guilty entered by the court of cоmmon pleas is an absolute constitutional bar to the Commonwealth’s appeals. Hence the Commonwealth’s appeals must be quashed. 2
Appeals quashed.
Notes
. Section 4522 provides:
“ Violation of Federal statute or regulation
(a) General rule. — No person shall drive a vehicle on any highway in violation of any provision of a Federal statute or regulation relating to any type of equipment or documents used in the vehicle while engaged in interstate commerce.
*397 (b) Penalty. — Any person violating this section is guilty of a summary offense and shall, upon conviсtion, be sentenced to pay a fine of $100.”
. Although appelleеs have not challenged the jurisdiction of this Court to consider the Commonwealth’s appeals, it is clear that
*399
“ ‘[t]he defendants] having been adjudged not guilty by the court which had jurisdiction to try [them,] we are without authority, in the сircumstances here presented, to reverse that judgment and order a new trial.’ ”
Commonwealth v. Haines,
supra,
