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The different organizations in the United States Federal Government use different terminology and lettering. Security clearances can be issued by many United States of America government agencies. The checks for clearances and the granting of clearances is carried out by the US Office of Personnel Management. [1] [2]
In pharmacology, clearance is a pharmacokinetic parameter representing the efficiency of drug elimination. This is the rate of elimination of a substance divided by its concentration. [ 1 ] The parameter also indicates the theoretical volume of plasma from which a substance would be completely removed per unit time.
An interim clearance may be denied (although the final clearance may still be granted) for having a large amount of debt, [40] having a foreign spouse, for having admitted to seeing a doctor for a mental health condition, or for having admitted to other items of security concern (such as a criminal record or a history of drug use.). When ...
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Clearance is therefore expressed as the plasma volume totally free of the drug per unit of time, and it is measured in units of volume per units of time. Clearance can be determined on an overall, organism level («systemic clearance») or at an organ level (hepatic clearance, renal clearance etc.). The equation that describes this concept is:
The government may wish to limit certain types of sensitive information only to those who work directly on related programs, regardless of the collateral clearance they hold. Thus, even someone with a Top Secret clearance cannot gain access to its Confidential information unless it is specifically granted.
An L clearance is a security clearance used by the United States Department of Energy (DOE) and Nuclear Regulatory Commission for civilian access relating to nuclear materials and information under the Atomic Energy Act of 1954. It is equivalent to a United States Department of Defense (DOD) Secret clearance. [1]
The term "security clearance" is also sometimes used in private organizations that have a formal process to vet employees for access to sensitive information. A clearance by itself is normally not sufficient to gain access; the organization must also determine that the cleared individual needs to know specific information. No individual is ...