2005 Federal Sentencing Guidelines
Chapter 2 - PART D - OFFENSES INVOLVING
DRUGS 
§2D1.9. Placing or Maintaining Dangerous Devices on Federal Property
to Protect the Unlawful Production of Controlled Substances; Attempt or Conspiracy 
(a) Base Offense Level: 23
Commentary
Statutory Provision: 21 U.S.C. § 841(d)(1).
Background: This section
  covers the offense of assembling, placing, or causing to be placed, or maintaining
  a "booby-trap"
  on federal property where a controlled substance is being manufactured or distributed. 
Historical Note: Effective
  November 1, 1987.  Amended effective November 1, 1992 (see Appendix
  C, amendment 447); November 1, 2002 (see Appendix
  C, amendment 646).