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A. Except for employees who are designated as " sensitive " in accordance with Section B , no employee will be subject to drug testing , unless ( 1 ) there is a reasonable , articulable suspicion to believe that that employee is under the influence of illegal drugs ; ( 2 ) it is part of an authorized Department investigation of a serious accident or unsafe practice ; and ( 3 ) [ it ] is part of a follow-up to counseling or rehabilitation through an Employee Assistance Program . The yardstick that 's held up by the people without it being asked directly is the safety aspect , whether they perceive it as being risky , or perceive it as being fun and the risk worth it . We do not warrant that the functions contained in the material contained in this site will be uninterrupted or error free , that defects will be corrected , or that this site or the server that makes it available are free of viruses or represent the full functionality , accuracy , reliability of the materials . " Quote 1 - " The idea that a lot of people believe now about cometary nuclei is this : you can think of it as being like a rubble pile of material ... Discovery.com does not warrant that the functional aspects of the Web site will be uninterrupted or error-free , or that this Web site or the server that makes it available are free of viruses or other harmful components . Yes , but these days we know a good deal more about them and it really is a most interesting period . In any event , as Justice Holmes once noted , " [ w ] hat usually is done may be evidence of what ought to be done , but what ought to be done is fixed by a standard of reasonable prudence , whether it usually is complied with or not .