At issue in this case is the constitutionality of a Lincoln ordinance which makes it unlawful to “intentionally or knowingly refuse to comply with an order of a police officer made in the performance of official duties at the scene of an arrest, accident, or investigation.” Lincoln Mun. Code § 9.08.050 (1990). In affirming the conviction of Kip P. Hookstra under this ordinance, the Nebraska Court of Appeals held that the ordinance was not facially unconstitutional on the ground of overbreadth and that Hookstra lacked standing to challenge the ordinance on the ground of vagueness. We granted Hookstra’s petition for further review and now affirm the judgment of the Court of Appeals.
BACKGROUND
Facts
We briefly summarize the operative facts which are fully set forth in the opinion of the Court of Appeals.
State
v.
Hookstra,
When Evans concluded the sobriety tests and began placing the motorist in the back seat of his police car, Hookstra and his friends began to “heckle” Evans and the motorist. Hookstra shouted slogans and told the motorist that he was not required to cooperate with Evans. Evans testified that this distracted him and upset the motorist. Evans was concerned for his own safety and that of the motorist because the commotion detracted from Evans’ ability to pay attention to the traffic around him and to the motorist.
Evans told Hookstra to leave the area, but Hookstra refused to do so despite the urging of his companions. After repeating the order two or three times, Evans then walked toward the sidewalk where Hookstra and the others were standing. Hookstra then began to walk backward, facing Evans with his fist raised in the air. Alerted by Evans, other Lincoln police officers took Hookstra into custody approximately one block from the scene of the incident and charged him with a violation of § 9.08.050.
Disposition Below
Hookstra filed a motion to quash the complaint on grounds that the Lincoln ordinance was, on its face, unconstitutionally overbroad and vague. The motion was overruled by the Lancaster County Court. Hookstra renewed the motion to quash at his trial but offered no evidence. He was found guilty and was fined $100 plus court costs. After the conviction was affirmed on appeal to the district court for Lancaster County, Hookstra perfected this timely appeal.
The Court of Appeals affirmed the conviction, holding that the ordinance was not unconstitutional on its face on the ground of overbreadth and that Hookstra lacked standing to challenge the statute on the ground of vagueness.
State
v.
Hookstra, supra.
In its overbreadth analysis, the Court of Appeals construed the word “order” in the Lincoln ordinance “by adding the ‘gloss’ that it be a ‘lawful order.’ ”
Id.
at 208,
*120 ASSIGNMENT OF ERROR
In his petition for further review, Hookstra assigns that the Court of Appeals erred in finding that the ordinance is not unconstitutionally overbroad and vague on its face in violation of his right of free speech under the Constitution of Nebraska and the Constitution of the United States.
STANDARD OF REVIEW
The constitutionality of an ordinance presents a question of law, in which an appellate court is obligated to reach a conclusion independent of the decision reached by the trial court.
Village of Winslow v. Sheets,
ANALYSIS
A challenge to a statute, asserting that no valid application of a statute exists because it is unconstitutional on its face, is a facial challenge.
State
v.
Kanarick,
Although we have referred to vagueness and overbreadth together, we have recognized that the two are conceptually distinct.
State
v.
Roucka, supra.
The doctrine of overbreadth pertains to a statute designed to burden, punish, or prohibit an activity that is not constitutionally protected, but which includes within its scope activities that are protected by the First Amendment to the
*121
U.S. Constitution.
State
v.
Schmailzl,
As a general rule, in a challenge to the overbreadth and vagueness of a law, a court’s first task is to analyze overbreadth.
State v. Sommerfeld,
“In a facial challenge to the overbreadth and vagueness of a law, a court’s first task is to determine whether the enactment reaches a substantial amount of constitutionally protected conduct. If it does not, then the overbreadth challenge must fail. The court should then examine the facial vagueness challenge and, assuming the enactment implicates no constitutionally protected conduct, should uphold the challenge only if the enactment is impermissibly vague in all of its applications. A plaintiff who engages in some conduct that is clearly proscribed cannot complain of the vagueness of the law as applied to the conduct of others.”
State
v.
Roucka,
OVERBREADTH CLAIM
A statute is unconstitutionally overbroad and thus offends the First Amendment if, in addition to forbidding speech or conduct which is not constitutionally protected, it also prohibits the exercise of constitutionally protected speech.
State
v.
Kipf,
The doctrine of substantial overbreadth provides an exception to the traditional rule of standing.
State
v.
Kipf supra.
Under the doctrine, an individual whose own speech or conduct may be prohibited is permitted to challenge an enactment on its face because it also threatens others not before the court who desire to engage in legally protected expression but who may refrain from doing so rather than risk prosecution or undertake to have the law declared partially invalid.
Id.
The doctrine is predicated on the sensitive nature of protected expression and the fear that “ ‘persons whose expression is constitutionally protected may well refrain from exercising their rights for fear of criminal sanctions by a statute susceptible of application to protected expression.’ ”
New York
v.
Ferber,
This “exception” to the traditional rule of standing is sometimes confused with the requirement in a facial challenge to a statute that the claimed overbreadth be “substantial.” In
State
v.
Sommerfeld,
However, the exception to the standing rule is conceptually distinguishable from the requirement that the overbreadth be substantial. In
Secretary of State of Md.
v.
J.H. Munson Co.,
Besides challenging [the professional fundraiser’s] standing as a “noncharity” to bring its claim, the Secretary urges that [the fundraiser] should not have standing to challenge the statute as overbroad because it has not demonstrated that the statute’s overbreadth is “substantial.” . . . The Secretary raises a point of valid concern. The Court has indicated that application of the overbreadth doctrine is “strong medicine” that should be invoked only “as a last resort.” . . . The Secretary’s concern, however, is one that is more properly reserved for the determination of [the] First Amendment challenge on the merits. The requirement that a statute be “substantially overbroad” before it will be struck down on its face is a “standing” question only to the extent that if the plaintiff does not prevail on the merits of its facial challenge and cannot demonstrate that, as applied to it, the statute is unconstitutional, it has no “standing” to allege that, as applied to others, the statute might be unconstitutional.... *124 We therefore move on to the merits of [the] First Amendment claim.
(Citations omitted.)
In considering the constitutionality of the Lincoln ordinance, we begin with well-established general principles. An ordinance, like a statute, is presumed to be constitutional and its unconstitutionality must be clearly established before it will be declared void.
City of Lincoln
v.
Bruce,
The latter principle is of particular importance when considering a claim of facial unconstitutionality based upon over-breadth. In
Broadrick v. Oklahoma,
With these principles in mind, we consider the limiting construction the Court of Appeals placed on the language of the Lincoln ordinance. Construed broadly, the ordinance could be
*125
deemed applicable to
any
order given by a police officer while performing official duties at the scene of an arrest, accident, or investigation. However, the Court of Appeals reasoned that the phrase “in the performance of official duties” placed a substantive limitation on the word “order” in that an order must conform to the law in order to be “made in the performance of official duties,” and therefore the “order” referred to by the ordinance must necessarily be a “ ‘lawful order.’ ”
State v. Hookstra,
On further review, Hookstra argues that the narrowing construction which the Court of Appeals placed on the language of the ordinance is improper because “[a] mere distinction between lawful and unlawful orders adds no objectivity or limits to an officer’s order” and that the term “lawful” is itself “merely another conclusory and overly broad term.” Supplemental brief for appellant in support of petition for further review at 3. We disagree. A court called upon to apply the ordinance, so narrowed, to a particular factual circumstance is certainly capable of determining whether the State has met its burden of proving that the order in question was a lawful one. We conclude that the language of the ordinance is susceptible to construction and that *126 the narrowing construction applied by the Court of Appeals was reasonable and appropriate.
The next question we must address is whether the Lincoln ordinance, so construed, is nonetheless so broad that every application of the ordinance creates an impermissible risk of suppression of ideas, or that the statute is “substantially over-broad” in that there is a realistic danger that the statute itself will significantly compromise recognized First Amendment protections of parties not before the court. See
State
v.
Kipf,
In
Broadrick
v.
Oklahoma,
*127 It remains a “matter of no little difficulty” to determine when a law may properly be held void on its face and when “such summary action” is inappropriate. . . . But the plain import of our cases is, at the very least, that facial over-breadth adjudication is an exception to our traditional rules of practice and that its function, a limited one at the outset, attenuates as the otherwise unprotected behavior that it forbids the State to sanction moves from “pure speech” toward conduct and that conduct — even if expressive — falls within the scope of otherwise valid criminal laws that reflect legitimate state interests in maintaining comprehensive controls over harmful, constitutionally unprotected conduct. Although such laws, if too broadly worded, may deter protected speech to some unknown extent, there comes a point where that effect — at best a prediction — cannot, with confidence, justify invalidating a statute on its face and so prohibiting a State from enforcing the statute against conduct that is admittedly within its power to proscribe. ... To put the matter another way, particularly where conduct and not merely speech is involved, we believe that the overbreadth of a statute must not only be real, but substantial as well, judged in relation to the statute’s plainly legitimate sweep.
(Citations omitted.)
The Lincoln ordinance differs from that in
Hill
in that it does not focus exclusively on speech. Indeed, many orders which a police officer may give to a citizen at the scene of an accident or crime are completely unrelated to speech, such as an order to detour around the scene of a motor vehicle accident; an order not to enter a crime scene under investigation; or an order that a bystander step aside in order to enable medical personnel to assist an injured victim. As the Court of Appeals correctly noted, the ordinance could also reach a police order involving “speech, conduct, or a combination thereof.”
State
v.
Hookstra,
Vagueness Claim
Unlike an attack based on the overbreadth of a statute, a vagueness challenge questions the clarity of statutory language. The traditional rule of standing applies to a facial challenge to a statute on the ground of vagueness.
State
v.
Roucka,
In denying Hookstra’s renewed motion to quash and finding him guilty of violating § 9.08.050 after trial, the county court made the following findings:
The Court finds that Officer Evans was in the performance of his official duties when he ordered the defendant Kip Hookstra to leave the area. The Court further finds that the defendant’s actions were interfering with the arrest procedure and the officer had legitimate safety concerns when ordering the defendant to leave the area.
*129 Hookstra did not challenge these factual findings on appeal or contend that his conduct did not clearly fall within that proscribed by the Lincoln ordinance. Accordingly, the Court of Appeals did not err in concluding that Hookstra lacked standing to assert a facial challenge based upon vagueness.
CONCLUSION
For the reasons discussed, we conclude that the Court of Appeals did not err in determining that § 9.08.050 was not unconstitutionally overbroad on its face and that Hookstra lacked standing to challenge the ordinance on grounds of vagueness. The judgment of the Court of Appeals is therefore affirmed.
Affirmed.
