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That means we all want to be there 24 hours a day . Once 24 hours have passed , the IT manager could instruct the system to keep a daily instance , then a weekly instance and then a monthly instance . As far as placing MPs or DA Civilian Police there 24 hours a day , I just do n't have the manpower . Fortunately , sunrise resets , or entrains , clocks that are not precisely 24 hours long . Most sites also have resident subwardens , usually postgraduate or mature students , which means there 's someone there 24 hours a day during term time in case of emergencies . There is no curfew at the hostel , but reception and bar will stop working at 2:00 am , security officer will be there 24 hours . They knew time was against them since the information provided by Billie Dunn was already 24 hours old . Unit dose medications and sterile products are prepared centrally 24 hours a day . Once 24 hours have elapsed , the statistics system will generate a new summary based on a 30 day window , counting backwards from the date you request the statistics . This cookie will be saved either until you clear the cookies from your browser or once 24 hours pass - the cookie is set to expire in 1 day .