— Gregory K. Crediford appeals his conviction on a charge of driving under the influence of intoxicating liquor. He challenges the constitutionality of the version of the driving under the influence statute that was in effect at the time he was cited. We reverse his conviction, holding that section (3) of that statute, which effectively imposes upon a defendant the burden of disproving an element of the offense by a preponderance of the evidence, violates Crediford’s right to due process.
*751In the fall of 1993, Crediford was charged in 'Whatcom County District Court with driving a motor vehicle while under the influence of intoxicants, in violation of RCW 46.61.502. Before trial, Crediford challenged the constitutionality of the statute and moved to dismiss the charge, or in the alternative, to suppress the results of an alcohol concentration test that had been administered to Crediford by a Washington State Patrol trooper. The trial court denied his motions. The case then proceeded to a bench trial on stipulated facts, which are set forth in full, as follows:
(1) On October 21, 1993, defendant Gregory Crediford operated a motor vehicle in Whatcom County, Washington.
(2) Washington State Patrol Trooper Kenneth VanKooten had probable cause to arrest Crediford for driving while under the influence of alcohol.
(3) At 5:15 a.m., within two hours of the defendant’s operation of a motor vehicle, the defendant had .16 percent by weight of alcohol in his blood as accurately analyzed in compliance with the laws of the State of Washington.
Br. of Resp’t at App. B. Based solely on these facts, the trial court found Crediford guilty of the charged offense.
Crediford appealed his conviction to the Whatcom County Superior Court, which affirmed. He then filed a motion in the Court of Appeals, Division One, for discretionary review of the superior court’s decision. The Court of Appeals certified the case to this court, and we accepted review.
I
Crediford first contends that the Legislature exceeded the police power of the State in enacting RCW 46.61.502. In that regard, he cites article I, section 1 of the Washington Constitution, which provides that "[a]ll political power is inherent in the people, and governments derive their just powers from the consent of the governed, and are established to protect and maintain individual *752rights.” We have previously held that, "[p]ursuant to [this provision,] the State Legislature may prescribe laws to promote the health, peace, safety, and general welfare of the people of Washington.” State v. Brayman, 110 Wn.2d 183, 192-93, 751 P.2d 294 (1988).
"A legislative enactment is presumed constitutional and the party challenging it bears the burden of proving it unconstitutional beyond a reasonable doubt.” Brayman, 110 Wn.2d at 193. A party asserting that a statute exceeds the State’s police power must overcome the presumption that "it (1) tends to correct some evil or promote some interest of the State, and (2) bears a reasonable and substantial relationship to accomplishing its purpose.” Brayman, 110 Wn.2d at 193 (citing State v. Conifer Enters., Inc., 82 Wn.2d 94, 96-97, 508 P.2d 149 (1973)).
At the time of Crediford’s conviction, the challenged statute read, in relevant part, as follows:
(1) A person is guilty of driving while under the influence of intoxicating liquor or any drug if the person drives a vehicle within this state:
(a) And the person has 0.10 grams or more of alcohol per two hundred ten liters of breath within two hours after driving, as shown by analysis of the person’s breath made under RCW 46.61.506; or
(b) And the person has 0.10 percent or more by weight of alcohol in the person’s blood within two hours after driving, as shown by analysis of the person’s blood made under RCW 46.61.506U
Former RCW 46.61.502 (effective July 25, 1993 through June 30, 1994).1 In Crediford’s view, RCW 46.61.502(1)(b) *753"does not bear a reasonable and substantial relationship to accomplishing its legitimate purpose because it punishes otherwise lawful behavior.” Appellant’s Opening Br. at 17.
As he did on appeal to the Whatcom County Superior Court, Crediford points to four scientific writings that discuss factors that may, according to the authors, inhibit the accurate measurement of the amount of alcohol in a person’s blood.2 He contends that because of these inherent difficulties, it is improbable that an alcohol concentration test administered within two hours after a person has been driving an automobile accurately indicates the amount of alcohol the driver had in his or her blood at the time of driving. Consequently, Crediford asserts that the challenged statute may punish persons whose blood alcohol concentration was less than 0.10 percent when they were driving. Such a law, he argues, "casts so wide a net in its attempt to criminalize driving while under the influence” that it "goes far beyond the means necessary to protect our streets . . . drawing in innocent persons and criminalizing behavior not generally deemed criminal.” Appellant’s Opening Br. at 18, 17; see Appellant’s Reply Br. at 9.
Crediford concedes, however, that it is well-recognized that the consumption of alcohol has an effect on a driver’s ability to drive, and that the Legislature has a "substantial state interest in reducing the risk posed by intoxicated drivers.” He notes also that this court has previously held that "laws which limit the consumption of alcohol by operators of motor vehicles are clearly within the prov*754ince of the Legislature.” Appellant’s Opening Br. at 17 (citing State v. Franco, 96 Wn.2d 816, 824, 639 P.2d 1320 (1982)).
With the aforementioned principles and Crediford’s concession in mind, it seems clear to us that the "evil” that the Legislature was intending to correct by enacting RCW 46.61.502(1) is "driving while under the influence of intoxicating liquor or any drug.” (Emphasis added.) Our conclusion that this was the Legislature’s intent is buttressed by the fact that the statute containing the so-called "two-hour rule” is part of the motor vehicle code, is entitled "Driving under the influence,” and contains a provision, which will be discussed at length below, providing an affirmative defense to a defendant who shows that he or she consumed a sufficient quantity of alcohol after driving so as to cause the alcohol concentration test to register 0.10 percent or greater. That being its intent, and because the Legislature is vested with " '[b]road discretion ... to determine what the public interest demands under particular circumstances, and what measures are necessary to secure and protect the same,’ ” Brayman, 110 Wn.2d at 193 (quoting Reesman v. State, 74 Wn.2d 646, 650, 445 P.2d 1004 (1968)), it was not irrational for the Legislature to attempt to accomplish its purpose by penalizing the excessive consumption of intoxicants associated with the operation of a motor vehicle. We are satisfied, therefore, that it was the Legislature’s prerogative to determine that there is a relevant relationship between a driver’s alcohol concentration of 0.10 percent or greater, as detected by an analysis of that person’s breath or blood within two hours of driving, and the ability of that driver to have safely operated a motor vehicle within the previous two hours. Stated more directly, the Legislature did not exceed the police power of the State when it enacted a statute that essentially says that a person whose blood or breath alcohol concentration is 0.10 percent or greater should not have been driving an automobile within the previous two hours, regardless of *755what the driver’s blood or breath alcohol concentration might have been at the time of driving.
It is equally clear to us, however, that the Legislature did not intend, by enacting this statute, to punish persons for the consumption of alcohol that was not associated with the operation of a motor vehicle. We say this despite the fact that a literal reading of RCW 46.61.502(1)(a) and (b) could lead a person to conclude otherwise. We are compelled to reach this conclusion because we are obliged to construe the statute in a way that is consistent with its underlying purpose and avoids constitutional deficiencies. See State ex rel. Faulk v. CSG Job Ctr., 117 Wn.2d 493, 500, 816 P.2d 725 (1991). See also In re Williams, 121 Wn.2d 655, 665, 853 P.2d 444 (1993) ("It is a general rule that statutes are construed to avoid constitutional difficulties when such construction is consistent with the purposes of the statute.” (citing CSG Job Ctr., 117 Wn.2d at 500)).
In order to give effect to the Legislature’s intentions, and, at the same time, avoid the constitutional defect that arises if the statute has an overly broad scope, we must, therefore, assume that a logically and legally required, albeit implied, element of the offense described in RCW 46.61.502 is that an amount of alcohol sufficient to cause a measurement of breath or blood of a defendant to register 0.10 percent or greater within two hours of driving was present in the defendant’s system while he or she was driving. This implied element (a nexus between the concentration of alcohol revealed by a blood or breath test administered within two hours of driving and the amount of alcohol present in the driver’s system when driving) mitigates Crediford’s concern that the statute criminalizes behavior not generally deemed criminal. We say this because the nexus element limits the application of RCW 46.61.502 to persons who drive after or while consuming intoxicants in sufficient quantity that within two hours after driving they register a reading of 0.10 percent blood or breath alcohol concentration. Because *756the statute, as construed, criminalizes only this behavior, the statute’s net is not cast so wide that it ensnares persons whose consumption of alcohol after driving causes, in whole or in part, that person’s alcohol concentration to reach or exceed 0.10 percent within two hours of driving.
In sum, because it is beyond debate that the Legislature may legitimately adopt statutes that penalize drivers for using the public’s highway and roads when they are impaired by the consumption of alcohol, we are satisfied that it did not exceed its authority under the police power of the State in making it an oifense for a driver to have an amount of alcohol in his or her system while driving that registers as 0.10 percent of breath or blood within two hours after driving.3
II
A.
Crediford also claims that RCW 46.61.502 denies him due process of law, as guaranteed by the Fifth and Fourteenth Amendments to the United States Constitution. In that regard, he asserts that the statute relieves the State of its burden of proving that the concentration of alcohol within a driver’s system, as measured within two hours after driving, reflects the existence of an alcohol *757concentration at the time of driving that was sufficient to have impaired that driver’s ability to safely drive. More specifically, he argues that the statute creates an evidentiary presumption that impermissibly removes from the trier of fact’s consideration the question of whether a person with a blood alcohol concentration of 0.10 percent or more within two hours of driving had the same or higher blood alcohol content at the time of driving. The State responds that this issue has been put to rest by the Brayman case in which we examined an earlier version of RCW 46.61.502, which was identical to the statute at issue here except for the "two-hour rule.” In Brayman, we held that rather than creating a presumption, the statute simply defines the "per se [driving while under the influence of alcohol offense] in terms of breath alcohol” concentration. Brayman, 110 Wn.2d at 191.
We agree with the State that RCW 46.61.502 does not create an unconstitutional conclusive presumption, and reaffirm the rationale underlying our holding in State v. Brayman, supra, that a statute does not create an unconstitutional conclusive presumption unless it requires a trier of fact to presume from the State’s proof of one fact some other fact that constitutes a necessary element of the crime. Brayman, 110 Wn.2d at 189-91. Here, the trier of fact is not required to presume one fact from another. Rather, RCW 46.61.502 simply defines the elements of a crime, and the trier of fact is asked to determine if the facts proving each of those elements of the crime are present.
The relevant offense, driving while under the influence of intoxicating liquor, is defined in the statute as being comprised of the following elements: (1) a vehicle was driven by the defendant, (2) upon a public road of this state, and (3) the concentration of alcohol in the defendant’s system, as revealed by an analysis of the defendant’s blood or breath, reached or exceeded 0.10 at any time within two hours after driving. Significantly, the driver’s alcohol concentration level at the time of driving is not an *758element of the offense. Contrary to Crediford’s contention, therefore, the statute does not require a jury to consider the relationship between the level of alcohol in the driver’s system when he or she was driving and the time the alcohol concentration test was administered.4 Consequently, we reject Crediford’s assertion that RCW 46.61.502 requires the finder of fact to presume "that the person drove while having a blood alcohol content of 0.10 if the person had a blood alcohol content of 0.10 at any time within two hours of driving.” Appellant’s Opening Br. at 9.
B.
Our disposition of the issue of whether the statute creates an impermissible presumption does not, however, entirely resolve this appeal. In our view, the thorny issue that remains is one that Crediford raises by his assertion that "an accused person has no burden to disprove any element of the crime, and any attempt to create such a burden violates an individual’s due process rights.” Appellant’s Opening Br. at 5 (emphasis added). His assertion raises the question of whether RCW 46.61.502 violates the Due Process Clause of the United States Constitution in that the affirmative defense provided for in subsection (3) of that statute relieves the State of its obligation to prove, beyond a reasonable doubt, every element of the charged crime, including the implied element that the alcohol that was in the driver’s system when he was operating his motor vehicle was sufficient to cause that driver’s blood alcohol concentration to exceed 0.10 at the time of testing.
*759Subsection (3) of RCW 46.61.502 reads as follows:
(3) It is an affirmative defense to a violation of subsection (l)(a) of [RCW 46.61.502] which the defendant must prove by a preponderance of the evidence that the defendant consumed a sufficient quantity of alcohol after the time of driving and before the administration of an analysis of the person’s breath or blood to cause the defendant’s alcohol concentration to be 0.10 or more within two hours after driving.[5]
Although this portion of the statute indicates that it is a defense to the offense created in RCW 46.61.502 that the driver’s blood alcohol concentration test results were affected by the consumption of alcohol between the time of driving and the time of the test, it places the burden on the defendant to establish the defense by a preponderance of evidence. This requirement flies in the face of the well-established principle that every person accused of a crime is constitutionally endowed with an overriding presumption of innocence, a presumption that extends to every element of the charged offense. Morissette v. United States, 342 U.S. 246, 275, 72 S. Ct. 240, 96 L. Ed. 288 (1952); State v. McHenry, 88 Wn.2d 211, 558 P.2d 188 (1977). It also runs counter to the constitutional requirement that the prosecution must prove every element of its case beyond a reasonable doubt. In re Winship, 397 U.S. 358, 363, 90 S. Ct. 1068, 25 L. Ed. 2d 368 (1970); State v. Roberts, 88 Wn.2d 337, 340, 562 P.2d 1259 (1977). In our view, because RCW 46.61.502(3) requires a defendant to disprove a necessary element of the offense, thus effectively placing the burden on that defendant to prove his or her innocence, it is violative of the Due Process Clause of the United States Constitution.
Our ruling that RCW 46.61.502(3) is constitutionally *760infirm does not, however, affect the remaining provisions of RCW 46.61.502. Caritas Servs., Inc. v. Department of Soc. & Health Servs., 123 Wn.2d 391, 416-17, 869 P.2d 28 (1994) ("An act of the legislature is not unconstitutional in its entirety because one or more of its provisions is unconstitutional unless the invalid provisions are unseverable and it cannot reasonably be believed that the legislature would have passed the one without the other, or unless the elimination of the invalid part would render the remainder of the act incapable of accomplishing the legislative purposes.” (quoting State v. Anderson, 81 Wn.2d 234, 236, 501 P.2d 184 (1972)).6
Because "once a statute has been construed by the highest court of the state, that construction operates as if it were originally written into it,” we must lastly determine whether (a) to remand the case so that Crediford may be retried for violating RCW 46.61.502, as that statute has been interpreted in this opinion, or (b) to apply the statute, absent the offending provision, to the stipulated facts to determine if the State proved all of the elements of the offense charged. State v. Darden, 99 Wn.2d 675, 679, 663 P.2d 1352 (1983) (quoting Johnson v. Morris, 87 Wn.2d 922, 927, 557 P.2d 1299 (1976)).
We choose to apply the statute ourselves for two reasons. First, because the trial was originally conducted on stipulated facts, this court is in the identical position as the trial court. Second, as we discuss below, the Double Jeopardy Clause of the United States Constitution "forbids a second trial for the purpose of affording the prosecution another opportunity to supply evidence which it failed to muster in the first proceeding.” State v. Hennings, 100 *761Wn.2d 379, 383, 670 P.2d 256 (1983) (quoting Burks v. United States, 437 U.S. 1, 9, 98 S. Ct. 2141, 57 L. Ed. 2d 1 (1978)).
Based on the sparse facts in the stipulation, it cannot be said that the State proved beyond a reasonable doubt that it was alcohol that was in Crediford’s system when he operated his vehicle that caused the measurement of alcohol in his blood, taken within two hours after driving, to exceed 0.10 percent. As recited above, the stipulated facts indicate only that the officer "had probable cause” to arrest Crediford and that the officer obtained a reading of Crediford’s blood alcohol level at .16 percent within two hours after Crediford had been driving. Significantly, the stipulation contains no information about whether the officer placed Crediford in custody under observation during that less than two-hour period. Based solely on the stipulation, we can say as a matter of law that the State failed to prove, beyond a reasonable doubt, that the concentration of alcohol in Crediford’s blood, as measured within two hours of driving, was not affected by alcohol he consumed after he drove. Finally, because the Double Jeopardy Clause of the United States Constitution entitles a defendant to dismissal with prejudice where there is a failure of proof, it is so ordered. See Burks, 437 U.S. at 10-11; State v. Stanton, 68 Wn. App. 855, 867, 845 P.2d 1365 (1993).
Dolliver, Smith, and Guy, JJ., concur.
This statute was amended during the 1994 Legislative session to read, in relevant part, as follows:
"(1) A person is guilty of driving while under the influence of intoxicating liquor or any drug if the person drives a vehicle within this state:
"(a) And the person has, within two hours after driving, an alcohol concentration of 0.10 or higher as shown by analysis of the person’s breath or blood made under RCW 46.61.506[.]” RCW 46.61.502 (as amended by Laws op 1994, ch. 275, § 2 (effective July 1, 1994)).
See Clerk’s Papers at 9-14 (referring to Kurt M. Dubowski, Ph.D., Absorption Distribution and Elimination of Alcohol: Highway Safety Aspects, J. op Stud, on Alcohol (Supp. 10 July 1985); A.W. Jones & A. Neri, Evaluation of Blood-Ethanol Profiles after Consumption of Alcohol Together with a Large Meal, 24 Canadian Soc’y Forensic Sci. J. No. 3 (1991); A.W. Jones, How Breathing Technique Can Influence the Results of Breath-Alcohol Analysis, 22 Med. Sci. L. No. 4 (1982); Rodney G. Gullberg, Differences between Roadside and Subsequent Evidential Breath Alcohol Results and Their Forensic Significance, 52 J. Stud, on Alcohol No. 4 (July 1991)).
Our ruling is consistent with rulings of courts in other states that have upheld statutes containing provisions that are similar to RCW 46.61.502(l)(a) and (b) against a variety of challenges. See State v. Martin, 174 Ariz. 118, 847 P.2d 619, 623 (Ct. App. 1992) (noting that the Legislature concluded that a person with a blood alcohol concentration of .10 or greater within two hours after driving poses a danger to the public) (relying upon Cacavas v. Bowen, 168 Ariz. 114, 811 P.2d 366, 368 (Ct. App. 1991)); Smith v. Charnes, 728 P.2d 1287 (Colo. 1986); City of Mankato v. Chirpich, 392 N.W.2d 34, 37 (Minn. App. 1986) (upholding Minnesota’s "two-hour rule” as a valid exercise of the legislative authority to define the elements of a crime), cert. denied, 481 U.S. 1015 (1987); State v. Howren, 312 N.C. 454, 323 S.E.2d 335, 338 (1984) ("The legislature may constitutionally make it a crime for persons to have an alcohol concentration of 0.10 or more at any relevant time after driving!.]”); City of Fargo v. Stensland, 492 N.W.2d 591, 594-95 (N.D. 1992) ("The legislature could reasonably conclude that those who drive a vehicle with a blood-alcohol content that is .10 % or greater, within two hours after relinquishing control of a vehicle, pose an unreasonable risk to public safety.”).
See Stensland, 492 N.W.2d at 594 ("The precise blood-alcohol content at the time of operation or control is not an element of the per se offense [of driving while under the influence of intoxicating liquor].”). See also Martin, 847 P.2d at 623; Cacavas, 811 P.2d at 368; Chirpich, 392 N.W.2d at 36 n.1. Similarly, we respectfully disagree with the Pennsylvania Supreme Court insofar as it reasoned that "the most glaring [constitutional] deficiency” in that state’s statute creating a "three-hour rule” that is analogous to the "two-hour rule” in RCW 46.61.502, was "that the statute completely fails to require any proof that the accused’s blood alcohol level actually exceeded the legal limit [of 0.10 percent] at the time of driving.” Commonwealth v. Barud, 545 Pa. 297, 681 A.2d 162, 166 (1996) (emphasis added).
Although RCW 46.61.502 was amended by the Legislature between the time of the incident on October 21, 1993 for which Crediford was cited, and July 21, 1994, when the Whatcom County Superior Court affirmed the district court’s ruling, subsection (3) of the statute remains, in substance, as it was worded at the time of his arrest. Compare Laws of 1994, ch. 275, § 2 (effective July 1,1994) and Laws of 1993, ch. 328, § 1 (effective July 25, 1993).
RCW 46.61.502(3) was first enacted by the Legislature as a section of Laws of 1993, ch. 328, which amended Laws of 1987, ch. 373. The earlier session law contained a severability clause which reads as follows: "If any provision of this act or its application to any person or circumstance is held invalid, the remainder of the act or the application of the provisions to other persons or circumstances is not affected.” Laws of 1987, ch. 373, § 8. "[A]bsent a contrary legislative intent in [an] amendment, an amendment to an act containing a severability clause is upon enactment covered by that clause.” Caritas Servs., 123 Wn.2d at 417.