The table below indicates what Sigma designations an individual may be authorized for, based on the clearance held. The individual, in addition, must have a "need-to-know" the classified information.

Notes:

• DoD = Department of Defense
• CNWDI = Critical Nuclear Weapon Design Information

• DoD Secret/Top Secret with CNWDI = DoD clearance holder has taken the CNWDI Briefing
• NASA Secret/TS Sigma eligibility applies only to work associated with the Space Program

• Department of Energy (DOE) L clearance does not grant any Sigma access

• Sigma 1 grants Sigmas 1-10
• Sigma 2 grants Sigmas 2-10
• Sigma 3 grants Sigmas 3-10
• Sigma 12 grants Sigma 13
  

Also see:
	Definitions of Sigma Categories
	Protection and Control of Sigma 14 and 15
	Sigma Access Authorization for LANL Workers