delivered the Opinion of the Court.
A jury convicted the defendant, the Pueblo County Sheriff, of one count of issuing a false certificate regarding Gary Perko in violation of section 18-8-406, 8B C.R.S. (1986). This charge arose from an order placed with GSI, Inc. on behalf of “deputies” Aaron G. Ghini, Frederick L. Mosher, and Gary Perko for Steyr AUG semi-automatic rifles. In conformity with an agreement entered into between GSI and federal authorities, a certificate written on Pueblo County Sheriff’s stationery and signed by defendant was attached to the purchase order. The certificate reads as follows:
CERTIFICATION OF SUPERVISORY LAW ENFORCEMENT OFFICIAL
To the Director, Bureau of Alcohol, Tobacco, and Firearms, I hereby certify as follows:
Deputy Gary Perko is a law enforcement deputy for this department who is authorized to carry a firearm in connection with his official duties. Deputy Perko is authorized to carry and use personally owned firearms in the performance of his official duties, and the firearm being purchased is for the performance of his official duties.
I am familiar with the circumstances surrounding the purchase of a STEYR AUG-SA by Deputy Perko. I am satisfied that the firearm is suitable for use in connection with official duties. I have been advised and assured that the firearm is in fact being purchased for use in connection with official duties and not for the purpose of transfer or resale. It is the policy of the department that deputies may carry and use personally owned firearms in connection with their official duties. Attached hereto is a copy of any written law, regulation or guidelines (to the extent such law, regulation, *907 or guidelines exist in written form) requiring, authorizing or permitting the use of personally owned firearms in connection with official duties.
I declare under penalty of perjury that the foregoing is true and correct. Executed on February 8, 1990.
/s/
Larry E. Buckallew Sheriff
Perko was not a law enforcement deputy who was authorized to carry firearms in connection with his official duties. He was employed at the Pueblo County Sheriffs Department in the detention bureau, and because his duties did not authorize him to carry firearms he was issued a “limited commission” as a deputy sheriff. In this capacity he was given no responsibilities which required him to use a weapon.
I
The defendant argues that the statute under which he was charged and convicted, § 18-8-406, 8B C.R.S. (1986), as applied to a county sheriff is void for vagueness and overbreadth. 1 Section 18-8-406 deals with the issuance of false certificates and provides:
A person commits a class 6 felony, if, being a public servant authorized by law to make and issue official certificates or other official written instruments, he makes and issues such an instrument containing a statement which he knows to be false.
It is well settled that “[w]hen reviewing a statute upon a challenge of unconstitutionality due to vagueness, the duty of the reviewing court is to construe the statute so as to uphold its constitutionality whenever a reasonable and practical construction may be applied to the statute.”
People v. Beruman,
Due process of law requires that a criminal statute be reasonably specific. This requirement, that terms of a penal statute
must be sufficiently explicit to inform those who are subject to it what conduct on their part will render them liable to its penalties is a well-recognized requirement, consonant alike with ordinary notions of fair play and the settled rules of law. And a statute which either forbids or requires the doing of an act in terms so vague that men of common intelligence must necessarily guess at its meaning and differ as to its application violates the first essential of due process of law.
Memorial Trusts v. Beery,
The defendant argues that section 18-8-406 is vague because the statute contains no definition of the phrase “authorized by law.” However, as we have noted in the past, a criminal statute does not need to contain a precise definition of every word or phrase constituting an element of the crime.
See People v. Schoondermark,
*908
Here, a readily ascertainable standard by which one’s conduct can be measured is present. A public servant is authorized by law to perform particular acts if there is a legislative enactment, a legally adopted administrative rule or regulation, or a judicial pronouncement which defines his duties.
See People v. Beruman,
We also reject defendant’s argument that the statute is overbroad. A statute is overbroad if, although ostensibly designed to punish activities which are not constitutionally protected, it infringes upon the enjoyment of protected fundamental rights by encompassing those activities within its prohibition, even though the unprotected activities might have been properly punished under a more carefully drawn statute.
People v. Becker,
II
Defendant next argues that section 18-8-406 does not apply to a county sheriff because a sheriff is not a public servant “authorized by law” to issue official certificates. ■ As noted above, section 18-8-406 makes it a crime for a “public servant authorized by law to make and issue official certificates or other official written instruments,” to make and issue “such an instrument containing a statement which [the public servant] knows to be false.” The defendant is clearly a public servant.
See
§ 18-8-101(3), 8B C.R.S. (1986) (“public servant” means an officer or employee of government whether elected or appointed). Thus, the issue is whether the defendant is “authorized by law” to make and issue official certificates. Although a sheriff’s authority is generally created by legislative enactment, a sheriff also has those implied powers which are reasonably necessary to execute those express powers.
Douglass v. Kelton,
It is clear that a sheriff cannot fully perform his functions without the implied power to make official certificates. As such, he is “authorized by law to make and issue official certificates,” and falls within the ambit of the statute.
Ill
The grand jury returned the following bill of indictment for count three, the count for which the defendant was convicted:
On or about the 8th day of February, 1990, Larry Eugene Buckallew, a public servant, the elected Sheriff of Pueblo County, Colorado, authorized by law to *909 make and issue official certificates and other official written instruments, did unlawfully and feloniously make and issue such an instrument, to wit: a written certification on official stationery of the Pueblo County Sheriffs Office, which on it’s [sic] face stated that it was a certification under the penalty of perjury. Said certificate falsely stated the position and authority of Gary Perko to allow Gary Perko to obtain federally restricted assault weapons. Larry Eugene Buckal-lew, knowing that said certification was false, submitted the false certificate to the Director of Alcohol, Tobacco and Firearms, a federal agency, so that weapons could be purchased by Gary Perko, the issuance of said false certification being an unlawful, felonious act in the State of Colorado in violation of C.R.S. § 18-8-406, as amended, Issuing a False Certificate.
A criminal indictment by a grand jury serves two essential purposes. First, the indictment must give the defendant sufficient notice of the crime that has allegedly been committed so that a defense may be prepared. Second, the indictment must define the acts which constitute the crime with sufficient definiteness so that the defendant may plead the resolution of the indictment as a bar to subsequent proceedings.
People v. Xericos,
The defendant raises several issues regarding the sufficiency of count three. We shall address each in turn. First, defendant argues that count three of the indictment failed to charge an offense because it did not specify the source of his alleged authority to issue official certificates. However, there is no need for the indictment to set forth the source of defendant’s authority as long as the duty to refrain from engaging in the prohibited conduct is clear from the count. Here, that duty, as mandated by section 18-8-406, is clearly identified in count three of the indictment.
People v. Beruman,
Defendant next argues that count three is insufficient because it fails to adequately identify the specific false statement deemed to violate section 18-8-406, 8B C.R.S. (1986). Where a statute defines an offense in general terms, the indictment must allege the acts and conduct of the defendant which are deemed to have violated the statute.
People v. Zupancic,
Count three identifies the false statements as the statements in the certificate pertaining to the position and authority of *910 Perko. The certificate states that “Perko is a law enforcement deputy ... authorized to carry a firearm in connection with his official duties. Deputy Perko is authorized to carry and use personally owned firearms in the performance of his official duties_” These two sentences, concerning the position and authority of Perko, are adequately described by count three of the indictment.
The defendant also argues that the count is insufficient in that it fails to identify the weapons and the restrictions which apply to the weapons. Defendant’s argument is without merit. Although the identity of the weapons and the restrictions applying to them are relevant facts, 2 neither constitute an element of the crime charged. As noted above, appropriate analysis examines whether the crime is adequately described to enable the defendant to defend against the charge, and plead the indictment as a bar to subsequent proceedings. Count three meets this standard; fundamental fairness does not require an indictment to set forth all the relevant facts in great detail.
Finally, defendant argues that count three is insufficient in that it fails to identify the official certificate or official written instrument referred to in the charge. We disagree. It clearly identifies the certificate at issue as the one: (1) made on or about February 8, 1990; (2) on the Pueblo County Sheriffs official stationery; (3) containing a statement concerning the position and authority of Perko; (4) a certificate for Perko to obtain federally restricted assault weapons; and (5) being submitted to the Director of Alcohol, Tobacco and Firearms, a federal agency. No more is required.
Accordingly, we reject defendant’s arguments that count three of the indictment failed to charge an offense.
IV
Finally, the defendant argues that the trial court erred in holding that the defendant was bound by departmental policies pertaining to the duties of deputies and the authorization of such deputies to acquire and use weapons in their duties. In effect, the defendant’s position is that the certification operated to “deputize” Perko overriding departmental policies to the contrary. Specifically, the defendant objects to the trial court’s refusal to give two tendered instructions. Tendered instruction 5 stated:
The sheriff of a county has the exclusive unlimited power and authority to appoint and to terminate the employment of deputy sheriffs, whether such deputies be full deputies or reserve deputies. The sheriff further has the exclusive and unlimited power and authority to specify and define the duties of the deputies and reserve deputies which he may appoint. The sheriff’s power and authority over deputies and their duties cannot be limited by departmental policies or procedures adopted by the sheriff for the administration of his department.
Tendered instruction 6 stated:
A county sheriff has the exclusive and unlimited power and authority to designate the type of firearms which may be acquired or used by deputy sheriffs or by reserve deputy sheriffs in connection with those duties which the sheriff may assign to such deputies or reserve deputies. The power or authority cannot be limited by departmental policies adopted for the administration of the sheriff’s department.
The trial court found that the tendered instructions were incomplete and inaccurate statements of the authority of a sheriff. This conclusion is correct. Section 30-10-510, 12A C.R.S. (1986), provides:
Every appointment of an undersheriff or of a deputy sheriff, and every revocation of such appointment, shall be in writing, under the hand of the sheriff, and shall be filed in the office of the county clerk and recorder; but this section shall not extend to any person who may be depu *911 tized by any sheriff or undersheriff to do a particular act only.
The “exclusive and unlimited power and authority” which the tendered instructions allege belong to the sheriff were incomplete and inaccurate statements of the law, and were properly refused.
People v. Alexander,
Judgment affirmed.
Notes
. Because the constitutionality of a statute is at issue in this appeal the court of appeals lacks jurisdiction, and this court has original appellate jurisdiction. Compare % 13-4-102(l)(b), 6A C.R.S. (1987) (court of appeals has no jurisdiction where constitutionality of statute at issue) with § 13-4-102(l)(b), 6A C.R.S. (1992 Supp.) (for appeals taken after July 1, 1992, the court of appeals has no jurisdiction over cases in which statute is declared unconstitutional).
. Absent the federal restrictions on sale of Steyr AUG semi-automatic rifles there would be no need for the defendant to have made the certification.
