Constructive Knowledge

Knowledge which may be found to have existed because the regulation, notice, fact, or directive at issue was of so notorious a nature, or was so conspicuously posted or distributed, that the particular accused ought to have known of its existence. Knowledge is constructive when it is shown that the accused would in the ordinary course of events, or by the exercise of ordinary care, have secured knowledge of the order, notice, fact, etc.

Source: Judge Advocate General