In a bicameral legislature, the legislators (law-makers) are divided into two chambers (camera means chamber in latin), so that each law can be voted on and checked twice. In a bicameral system the laws need aproval of over half of each chambers (but sometimes a two-thirds majority of one of the chambers can overrule the other chamber's lack of approval).
Government control is the second major requirement that must be met before information can be classified. Information must be under U.S. Government control before classification of that information by that government is anything other than a relatively ineffective action.
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