§ 3553(b)(1), or an aggravating circumstance in a case under 18 U.S.C. § 3553(b)(2)(A)(i), to a degree not adequately taken into consideration in the guidelines. However, inasmuch as the Commission has continued to monitor and refine the guidelines since their inception to determine the most appropriate weight to be accorded the mitigating and aggravating circumstances specified in the guidelines, it is expected that departures based on the weight accorded to any such circumstance will occur rarely and only in exceptional cases.
(ii) Examples.—As set forth in subsection (a)(3), if the applicable offense guideline and adjustments take into consideration a circumstance identified in this subpart, departure is warranted only if the circumstance is present to a degree substantially in excess of that which ordinarily is involved in the offense. Accordingly, a departure pursuant to §5K2.7 for the disruption of a governmental function would have to be substantial to warrant departure from the guidelines when the applicable offense guideline is bribery or obstruction of justice. When the guideline covering the mailing of injurious articles is applicable, however, and the offense caused disruption of a governmental function, departure from the applicable guideline range more readily would be appropriate. Similarly, physical injury would not warrant departure from the guidelines when the robbery offense guideline is applicable because the robbery guideline includes a specific adjustment based on the extent of any injury. However, because the robbery guideline does not deal with injury to more than one victim, departure may be warranted if several persons were injured.
(C) Departures Based on Circumstances Identified as Not Ordinarily Relevant.—Because certain circumstances are specified in the guidelines as not ordinarily relevant to sentencing (see, e.g., Chapter Five, Part H (Specific Offender Characteristics)), a departure based on any one of such circumstances should occur only in exceptional cases, and only if the circumstance is present in the case to an exceptional degree. If two or more of such circumstances each is present in the case to a substantial degree, however, and taken together make the case an exceptional one, the court may consider whether a departure would be warranted pursuant to subsection (c). Departures based on a combination of not ordinarily relevant circumstances that are present to a substantial degree should occur extremely rarely and only in exceptional cases.
In addition, as required by subsection (e), each circumstance forming the basis for a departure described in this subdivision shall be stated with specificity in the written judgment and commitment order.
4. Downward Departures in Child Crimes and Sexual Offenses.—
(A) Definition.—For purposes of this policy statement, the term "child crimes and sexual offenses" means offenses under any of the following: 18 U.S.C. § 1201 (involving a minor victim), 18 U.S.C. § 1591, or chapter 71, 109A, 110, or 117 of title 18, United States Code.
(B) Standard for Departure.—
(i) Requirement of Affirmative and Specific Identification of Departure