Colorado § 18-1-503.5 - Principles of criminal culpability.

Full text of Colorado Colorado Revised Statutes § 18-1-503.5 — Principles of criminal culpability., with citation guidance and answers to common questions.

§ 18-1-503.5. Principles of criminal culpability.

(1) If the criminality of conduct depends on a child being younger than eighteen years of age and the child was in fact at least fifteen years of age, it shall be an affirmative defense that the defendant reasonably believed the child to be eighteen years of age or older. This affirmative defense shall not be available if the criminality of conduct depends on the defendant being in a position of trust.

(2) If the criminality of conduct depends on a child's being younger than eighteen years of age and the child was in fact younger than fifteen years of age, there shall be no defense that the defendant reasonably believed the child was eighteen years of age or older.

(3) If the criminality of conduct depends on a child being younger than fifteen years of age, it shall be no defense that the defendant did not know the child's age or that the defendant reasonably believed the child to be fifteen years of age or older.

Source: L. 2001: Entire section added, p. 859, § 6, effective July 1. L. 2007: (1) amended, p. 1687, § 4, effective July 1.

Cross references: For affirmative defenses generally, see §§ 18-1-407, 18-1-710, and 18-1-805.

ANNOTATION

Subsection (1) eliminates the culpable mental state as to age prescribed by § 18-6-403 (3), "knowingly", and replaces it with that of subsection (1), "lack of reasonable belief". People v. Bath, 890 P.2d 269 (Colo. App. 1994).

The affirmative defense created in this section applies to the offense of contributing to the delinquency of a minor under § 18-6-107. But where defendant did not raise this affirmative defense in a manner sufficient to meet the defendant's initial burden, the trial court did not err in refusing to instruct the jury on this affirmative defense. People v. Hastings, 983 P.2d 78 (Colo. App. 1999), aff'd, 19 P.3d 662 (Colo. 2000); People v. Gorman, 983 P.2d 92 (Colo. App. 1999), aff'd, 19 P.3d 662 (Colo. 2000).

Subsection (1), by providing for the affirmative defense of reasonable belief, manifests a clear legislative intent that the culpable mental state of "knowingly" in § 18-6-403 does not apply to the age of the victim. People v. Bath, 890 P.2d 269 (Colo. App. 1994).

Subsection (1) of this section does not apply to offenses charged under § 18-7-407. People v. Houser, 2013 COA 11, 337 P.3d 1238.

Subsection (2) limits an affirmative defense and creates a strict liability crime, both of which are within the constitutional power of the general assembly. People v. Salazar, 920 P.2d 893 (Colo. App. 1996).

By applying subsection (2), the trial court did not relieve the prosecution of its burden to prove essential elements of the offense charged. People v. Salazar, 920 P.2d 893 (Colo. App. 1996).

Legislative history relating to the adoption of subsection (2) and § 18-3-405 (1) demonstrates that the general assembly intended the offense of sexual assault on a child to be a strict liability offense. People v. Salazar, 920 P.2d 893 (Colo. App. 1996).

Source: official Colorado text · Last verified 2026-08-27

Frequently Asked Questions About Colorado § 18-1-503.5

What does Colorado Revised Statutes § 18-1-503.5 cover?

Section 18-1-503.5 ("Principles of criminal culpability.") is part of the Colorado Revised Statutes, the codified statutory law of Colorado. It sets out the legal rule or procedure described in the text above. Statutes are amended regularly, so always verify against the official source.

How do I cite Colorado § 18-1-503.5?

A common citation format is "Colorado Revised Statutes § 18-1-503.5" (Colorado). Legal writing may require the code abbreviation, section number, and year or edition. Match the style required by your court, professor, or publisher.

Is this the official text of Colorado law?

No. This page is for research and education and may not include the most recent amendments. For official current law, check the Colorado official source linked on this page or consult a licensed Colorado attorney.

How does Colorado § 18-1-503.5 apply to my situation?

Statutes are interpreted in context, and application depends on your specific facts. Only a licensed attorney in Colorado can advise on how this section applies to you. Contact your state or local bar association for a referral.

Sources & Verification

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